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

void main(void) {
	char nameA[1000] = "a" ; 
	scanf("%s ",nameA);
	char pointA[1000000] = "0";
	scanf("%s ", pointA);
	char moveA = 'a';
	scanf("%c",&moveA);
	char nameB[1000] = "a" ; 
	scanf("%s ",nameB);
	char pointB[1000000] = "0";
	scanf("%s ", pointB );
	char moveB = 'a';
	scanf("%c",&moveB);

	if((int)strlen(pointA) > (int)strlen(pointB)){
		printf("%s",nameA);
	}else if((int)strlen(pointA) < (int)strlen(pointB)){
		printf("%s",nameB);
	}else{
		for(int i = 0 ; i < (int)strlen(pointA);i++){
			if(pointA[i] - '0' > pointB[i] - '0'){
				printf("%s",nameA);
				break;
			}else if(pointA[i] - '0' < pointB[i] - '0'){
				printf("%s",nameB);
				break;
			}
			if( i == (int)strlen(pointA) -1 && pointA[i] - '0' == pointB[i] - '0'){
				printf("-1");
			}
		}
	}

}