obso_lis = [int(x) for x in input().split('.')]
ver_lis = [int(x) for x in input().split('.')]

obso = obso_lis[0] * 101**2 + obso_lis[1] * 101 + obso_lis[2]
ver = ver_lis[0] * 101**2 + ver_lis[1] * 101 + ver_lis[2]
if ver <= obso:
  print('YES')
else:
  print('NO')