#include <stdio.h>

int main(void) {
	char Sa[101], Sb[101], Xa[2], Xb[2];
	long long int Pa, Pb;
	scanf("%s%lld%s", Sa, &Pa, Xa);
	scanf("%s%lld%s", Sb, &Pb, Xb);
//	printf("%s %lld %s\n", Sa, 99999999999999999999LL, Xa);
//	printf("%s %lld %s\n", Sb, Pb, Xb);
	if(Pa > Pb)printf("%s\n", Sa);
	else if(Pa < Pb)printf("%s\n", Sb);
	else printf("-1\n");

    return 0;
}