list0 = input().split(".")
list1 = input().split(".")

flag = "YES"
if list0[0] < list1[0]:
    flag = "NO"
else:
    if list0[1] < list1[1]:
        flag = "NO"
    else:
        if list0[2] < list1[2]:
            flag = "NO"
        else:
            pass

print(flag)