a,b,c = list(map(int, input().split('.')))
x,y,z = list(map(int, input().split('.')))

old = False
if a < x:
    old = False
elif a > x:
    old = True
else:
    if b < y:
        old = False
    elif b > y:
        old = True
    else:
        if c < z:
            old = False
        else:
            old = True

if old:
    print('YES')
else:
    print('NO')