fossil = map(int, raw_input().split("."))
target = map(int, raw_input().split("."))

if fossil[0] > target[0]:
    ans = "YES"
elif fossil[0] < target[0]:
    ans = "NO"
else:
    if fossil[1] > target[1]:
        ans = "YES"
    elif fossil[1] < target[1]:
        ans = "NO"
    else:
        if fossil[2] >= target[2]:
            ans = "YES"
        else:
            ans = "NO"

print ans