#include <stdio.h>
#include <string.h>

int main(void){
	int ret;
	char nameA[110], nameB[110];
	char pointA[11000], pointB[11000];
	char handA[10], handB[10];
	
	scanf("%s %s %s", nameA, pointA, handA);
	scanf("%s %s %s", nameB, pointB, handB);
	
	if( strlen(pointA) > strlen(pointB) ){
		printf("%s\n", nameA);
	}else if( strlen(pointA) < strlen(pointB) ){
		printf("%s\n", nameB);
	}else{
		if( strlen(pointA) == strlen(pointB) ){
			ret = strcmp(pointA, pointB);
			if( ret > 0 ){
				printf("%s\n", nameA);
			}else if(ret < 0){
				printf("%s\n", nameB);
			}else{
				printf("-1\n");
			}
		}
	}
	
	return 0;
}