# yukicoder No.201 yukicoderじゃんけん

S_A, P_A, X_A = input().split()
S_B, P_B, X_B = input().split()
P_A, P_B = int(P_A), int(P_B)

if P_A == P_B:
    print(-1)
else:
    print(S_A if P_A > P_B else S_B)