def split_comma(i):
    s_i = i.split('.')
    a = [int(v) for v in s_i]
    return a

f = input()
a = split_comma(f)
g = input()
b = split_comma(g)

def version_check(a, b):
    if a > b:
        return -1
    elif a == b:
        return 0
    else:
        return 1

i = 0
for v in range(0,3):
    c = version_check(a[v],b[v])
    if c == -1:
        print('YES')
        break
    elif c == 1:
        print('NO')
        break
    else:
        i += 1
        if i == 3:
            print('YES')