#include <stdio.h>
#include <ctype.h>
int main(void){
	int a;
	while(scanf("%d",&a),a){
		if(getchar()==' '){
			a=getchar();
			if(a=='\n')return 1;
			if(isupper(a))while(1);
			if(a==' '){puts("foo");return 0;}
		}
		scanf(" %*c %*c %*c");
	}
	return 0;
}