import datetime
date = datetime.datetime.strptime('/'.join([x for x in input().split(' ')]), '%Y/%m/%d')
s_period = datetime.datetime.strptime('1969/12/31', '%Y/%m/%d')
e_period = datetime.datetime.strptime('2019/04/30', '%Y/%m/%d')

if s_period <= date <= e_period:
    print('Yes')
else:
    print('No')