def fb(n):
    r = ''
    if n % 3 == 0:
        r += "fizz"
    if n % 5 == 0:
        r += "buzz"
    if n % 3 != 0 and n % 5 != 0:
        r = str(n)
    return r

i = 1
while i <= 20:
    print(i, fb(i))
    i = i + 1