def target_index(l, x, default=999):
    if x in l:
        return l.index(x)
    else:
        return default
    
list_0 = input().split('.')
list_1 = input().split('.')

rel = []

for i in range(3):
    if int(list_0[i]) == int(list_1[i]):
        rel.append(0)
    elif int(list_0[i]) > int(list_1[i]):
        rel.append(-1)
    elif int(list_0[i]) < int(list_1[i]):
        rel.append(1)

judge_list = [i <= 0 for i in rel]

res = 0

if all(judge_list) == True:
    res = 1

if target_index(rel, -1) == 0:
    res = 1
else:
    res = 0
    
if res == 1:
    print('YES')
else:
    print('NO')