def fb(n):
    if i % 3 == 0 and  i % 5 == 0:
        fb = "  " + "Fizz" + "Buzz"
        return fb
    elif i % 3  == 0:
        fb = "  " + "Fizz"
        return fb
    elif i % 5 == 0:
        fb = "  " +  "Buzz"
        return fb
    else:
        fb = ""
        return fb

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