#include <stdio.h>

int main() {
	char answer=' ';
	
	printf("(F)irst,(S)econd,(T)hird\n");
	
	scanf("%c",&answer);

	while(answer !='F' && answer !='S'  && answer !='T') {
		printf("(F)irst,(S)econd,(T)hird\n");
	
		scanf("%c",&answer);
	}

	return 0;
}

##</code><code>##

my $ans;

print "(F)irst,(S)econd,(T)hird\n";

chomp($ans=<STDIN>);


while($ans ne 'F' && $ans ne 'S' && $ans ne 'T') {
	print "(F)irst,(S)econd,(T)hird\n";
	chomp($ans=<STDIN>);
}