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%Start A str def thru sh
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%{
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#undef	input
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#undef	unput
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include "grap.h"
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#include "y.tab.h"
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extern	struct	symtab	symtab[];
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int	yyback(int *, int);
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int	yylook(void);
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int	yywrap(void);
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void	shell_init(void), shell_exec(void), shell_text(char *);
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#define	CADD	cbuf[clen++] = yytext[0]; \
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		if (clen >= CBUFLEN-1) { \
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			ERROR "string too long", cbuf WARNING; BEGIN A; }
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#define	CBUFLEN	1500
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char	cbuf[CBUFLEN];
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int	clen, cflag;
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int	c, delim, shcnt;
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%}
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A	[a-zA-Z_]
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B	[a-zA-Z0-9_]
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D	[0-9]
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WS	[ \t]
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%%
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	if (yybgin-yysvec-1 == 0) {	/* witchcraft */
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		BEGIN A;
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	}
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<A>{WS}		;
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<A>"\\"\n	;
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<A>\n		return(ST);
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<A>";"		return(ST);
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<A>line		return(yylval.i = LINE);
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<A>arrow	{ yylval.i = ARROW; return(LINE); }
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<A>circle	return(yylval.i = CIRCLE);
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<A>frame	return(FRAME);
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<A>tick(s)?	return(TICKS);
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<A>grid(line)?(s)?	return(GRID);
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<A>coord(s)?	return(COORD);
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<A>log		return(LOG);
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<A>exp		return(EXP);
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<A>sin		return(SIN);
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<A>cos		return(COS);
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<A>atan2	return(ATAN2);
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<A>sqrt		return(SQRT);
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<A>rand		return(RAND);
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<A>max		return(MAX);
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<A>min		return(MIN);
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<A>int		return(INT);
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<A>print	return(PRINT);
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<A>sprintf	return(SPRINTF);
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<A>pic{WS}.*	{ yylval.p = tostring(yytext+3); return(PIC); }
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<A>graph{WS}.*	{ yylval.p = tostring(yytext+5); return(GRAPH); }
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<A>for		return(FOR);
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<A>^Endfor\n	{ endfor(); }
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<A>do		{ yylval.p = delimstr("loop body"); BEGIN A; return(DOSTR); }
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<A>copy|include	{ return(COPY); }
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<A>thru|through	{ BEGIN thru; return(THRU); }
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<thru>{WS}+	;
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<thru>{A}{B}*|.	{ yylval.op = copythru(yytext); BEGIN A; return(DEFNAME); }
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<A>until	return(UNTIL);
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<A>if		return(IF);
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<A>then		{ yylval.p = delimstr("then part"); BEGIN A; return(THEN); }
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<A>else		{ yylval.p = delimstr("else part"); BEGIN A; return(ELSE); }
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<A>next		return(NEXT);
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<A>draw		return(yylval.i = DRAW);
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<A>new		return(yylval.i = NEW);
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<A>plot		return(yylval.i = PLOT);
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<A>label(s)?	return(LABEL);
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<A>x		return(X);
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<A>y		return(Y);
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<A>top		{ yylval.i = TOP; return SIDE; }
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<A>bot(tom)?	{ yylval.i = BOT; return SIDE; }
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<A>left		{ yylval.i = LEFT; return SIDE; }
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<A>right	{ yylval.i = RIGHT; return SIDE; }
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<A>up		return(yylval.i = UP);
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<A>down		return(yylval.i = DOWN);
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<A>across	return(yylval.i = ACROSS);
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<A>height|ht	return(yylval.i = HEIGHT);
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<A>wid(th)?	return(yylval.i = WIDTH);
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<A>rad(ius)?	return(yylval.i = RADIUS);
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<A>invis	return(yylval.i = INVIS);
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<A>dot(ted)	return(yylval.i = DOT);
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<A>dash(ed)	return(yylval.i = DASH);
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<A>solid	return(yylval.i = SOLID);
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<A>ljust	{ yylval.i = LJUST; return JUST; }
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<A>rjust	{ yylval.i = RJUST; return JUST; }
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<A>above	{ yylval.i = ABOVE; return JUST; }
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<A>below	{ yylval.i = BELOW; return JUST; }
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<A>size		return(yylval.i = SIZE);
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<A>from		return(yylval.i = FROM);
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<A>to		return(yylval.i = TO);
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<A>by|step	return(yylval.i = BY);
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<A>at		return(yylval.i = AT);
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<A>with		return(yylval.i = WITH);
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<A>in		return(yylval.i = IN);
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<A>out		return(yylval.i = OUT);
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<A>off		return(yylval.i = OFF);
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<A>sh{WS}+ {	BEGIN sh;
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		if ((delim = input()) == '{') {
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			shcnt = 1;
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			delim = '}';
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		}
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		shell_init();
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	}
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<sh>{A}{B}* {
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		int c;
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		Obj *p;
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		if (yytext[0] == delim) {
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			shell_exec();
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			BEGIN A;
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		} else {
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			p = lookup(yytext, 0);
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			if (p != NULL && p->type == DEFNAME) {
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				c = input();
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				unput(c);
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				if (c == '(')
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					dodef(p);
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				else
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					pbstr(p->val);
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			} else
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				shell_text(yytext);
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		}
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	}
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<sh>"{"		{ shcnt++; shell_text(yytext); }
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<sh>"}"		{ if (delim != '}' || --shcnt > 0)
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			shell_text(yytext);
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		  else {
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			shell_exec();
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			BEGIN A;
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		  }
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		}
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<sh>.|\n	{ if (yytext[0] == delim) {
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			shell_exec();
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			BEGIN A;
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		  } else
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			shell_text(yytext);
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		}
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<A>define{WS}+	{ BEGIN def; }
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<def>{A}{B}*	{ definition(yytext); BEGIN A; }
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<A>({D}+("."?){D}*|"."{D}+)((e|E)("+"|-)?{D}+)?i? {
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		  yylval.f = atof(yytext); return(NUMBER); }
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<A>^"."[^0-9].*	{ if (yytext[1] == 'G' && yytext[2] == '2') {
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			yylval.i = yytext[2];
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			return(EOF);
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		  } else {
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			yylval.p = tostring(yytext);
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			return(PIC);
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		  }
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		}
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<A>{A}{B}* {
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		int c;
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		Obj *p;
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		p = lookup(yytext, 1);
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		if (p->type == DEFNAME) {
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			c = input();
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			unput(c);
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			if (c == '(')	/* it's name(...) */
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				dodef(p);
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			else	/* no argument list */
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				pbstr(p->val);
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		} else {
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			yylval.op = p;
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			return p->type;	/* NAME or VARNAME */
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		}
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	}
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<A>"=="		return(EQ);
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<A>">="		return(GE);
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<A>"<="		return(LE);
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<A>"!="		return(NE);
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<A>">"		return(GT);
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<A>"<"		return(LT);
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<A>"&&"		return(AND);
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<A>"||"		return(OR);
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<A>"!"		return(NOT);
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<A>\"		{ BEGIN str; clen = 0; }
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<A>#.*		;
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<A>.		{ yylval.i = yytext[0]; return(yytext[0]); }
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<str>\"		{ BEGIN A; cbuf[clen] = 0;
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		  yylval.p = tostring(cbuf); return(STRING); }
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<str>\n		{ ERROR "newline in string" WARNING; BEGIN A; return(ST); }
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<str>"\\\""	{ cbuf[clen++] = '\\'; cbuf[clen++] = '"'; }
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<str>"\\\\"	{ cbuf[clen++] = '\\'; cbuf[clen++] = '\\'; }
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<str>.		{ CADD; }
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%%