#include
#include
#include
int main(void)
{
char *s;
register int i;
s = malloc(80);
if(!s) {
printf("Memory request failed.\n");
exit(1);
}
gets(s);
for(i = strlen(s) - 1; i >= 0; i--)
putchar(s[ i ]);
free(s);
return 0;
}