%{

#include<stdio.h>
#include<stdlib.h>
int suma=0, i=0;
char pom;

%}

CISLA [0-9]
PRAZDNY 	[ \t\n\r]

%%

^{CISLA}+{PRAZDNY}+ {suma = yyleng-1;
for (i=0;i< (suma/2);i++) {
pom = yytext[i];
yytext[i] = yytext[suma-i-1];
yytext[suma-1-i] = pom;
}
printf("%s", yytext);
yyless(yyleng - 1);
}
^{PRAZDNY}+{CISLA}+{PRAZDNY}+ {
suma = yyleng-1;
for (i=0;i< (suma/2);i++) {
pom = yytext[i];
yytext[i] = yytext[suma-i-1];
yytext[suma-1-i] = pom;
}
printf("%s", yytext);
yyless(yyleng - 1);
}
.

%%

main (int argc, char **argv)
	{
	yylex();
	}