a = list(map(int, input().split('.')))
b = list(map(int, input().split('.')))


l = []
for i in range(3):
    if a[i] - b [i] > 0:
        print('NO')
        break
    elif a[i] - b [i] == 0:
        print('YES')
        break
else:
    print('YES')