A = list(input().split("."))
B = list(input().split("."))

for i in range(3) :
    A[i] = int(A[i])
    B[i] = int(B[i])
if A[0] < B[0] :
    ans = "NO"
elif A[1] < B[1] :
    ans = "NO"
elif A[2] < B[2] :
    ans = "NO"
else :
    ans = "YES"
print(ans)