a, b, c = map(int, input().split("."))
x, y, z = map(int, input().split("."))
if a < x:
    print("NO")
elif a == x:
    if b < y:
        print("NO")
    elif b == y:
        if c < z:
            print("NO")
        else:
            print("YES")
    else:
        print("YES")
else:
    print("YES")