#include <bits/stdc++.h>
using namespace std;

#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define repi(i,a,b) for(int i=int(a);i<(int)(b);i++)
#define all(x) (x).begin(),(x).end()
#define foreach(u,v) for(auto (u) : (v))
#define pb push_back
#define mp make_pair
#define mt make_tuple

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<ll, ll> pll;
typedef vector<ll> vl;

const int inf = 1e9;
const ll linf = 1e18;
const ll mod = 1e9 + 7;
const double eps = 1e-9;

int main()
{
  string s;
  cin >> s;
  int n = s.size();

  int a = 0;
  rep(i, n){
    a += s[i] - '0';
    a %= 3;
  }

  bool flag = true;
  if(n%2) flag = false;
  else{
    for(int i = 0; i+1< n; i+=2){
      if(s[i] != s[i+1]) flag = false;
    }
  }

  if(flag and a == 0){
    cout << "FizzBuzz" << endl;
  }else if(a == 0){
    cout << "Fizz" << endl;
  }else if(flag){
    cout << "Buzz" << endl;
  }else{
    cout << n << endl;
  }

  return 0;
}