#include <stdio.h>

int main(void)
{
	char sa[101], sb[101];
	long long int pa, pb;
	char xa, xb; 
	scanf("%s%lld%c", sa, &pa, &xa);
	getchar();
	scanf("%s%lld%c", sb, &pb, &xb);
	printf("%lld\n", pa);
	if(pa > pb)printf("%s\n", sa);
	else if(pa < pb)printf("%s\n", sb);
	else printf("-1\n");
	
	return 0;
}