1 #include <iostream>
 2 #include <cstring>
 3 #define MAX 1100
 4 using namespace std;
 5 
 6 int fb[MAX],sg[MAX],all;
 7 bool f[MAX];
 8 
 9 int main()
10 {
11     int n,m,p;
12     ios::sync_with_stdio(false);
13     fb[0]=1; fb[1]=2;
14     for(int all=2;fb[all-1]+fb[all-2]<=2000;all++){
15         fb[all]=fb[all-1]+fb[all-2];
16     }
17     sg[0]=0;
18     for(int i=1;i<=1000;i++){
19         memset(f,0,sizeof(f));
20         for(int j=0;fb[j]<=i;j++){
21             f[sg[i-fb[j]]]=1;
22         }
23         for(int j=0;j<=i;j++){
24             if(!f[j]){
25                 sg[i]=j;
26                 break;
27             }
28         }
29     }
30     while(cin>>n>>m>>p,(n+m+p)){
31         if(sg[n]^sg[m]^sg[p]) cout<<"Fibo"<<endl;
32         else cout<<"Nacci"<<endl;
33     }
34     return 0;
35 }