def get_version(a, b, c):
    return int(a * 10 ** 6 + b * 10 ** 3 + c)

fa, fb, fc = map(int, input().split("."))
a, b, c = map(int, input().split("."))

fversion = get_version(fa, fb, fc)
version = get_version(a, b, c)

if version <= fversion:
    print("YES")
else:
    print("NO")