def fb(n):
    if n % 15 == 0:
        s = "FizzBuzz"

    elif n % 5 == 0:
        s = "Buzz"

    elif n % 3 == 0:
        s = "Fizz"

    else:
        s = "" #イケてない・・・
    return s

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