import strutils as str

proc fizzBuzz(N: int) = 
    var i = 1
    while i < N:
        var s: string = "";
        if i mod 3 == 0:
            s = s & "Fizz"
        if i mod 5 == 0:
            s = s & "Buzz"
        if len(s) == 0:
            echo i
        else: echo s
        i.inc
        
        
fizzBuzz(str.parseInt(readLine(stdin)))