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

int main(){
    long s1,s2;
    char p1[101],p2[101],x1[2],x2[2];
    
    scanf("%s %ld %s", p1, &s1, x1);
    scanf("%s %ld %s", p2, &s2, x2);
    
    if(s1>s2){
        printf("%s\n",p1);
    }else if(s1<s2){
        printf("%s\n",p2);
    }else{
        printf("%d\n",-1);
    }
    return 0;
}