#include <cstdio>
#include <iostream>
#include <cstring>
#include <string>
using namespace std;

int sg[1005];
int f[20];
bool vis[1005];

void Init()
{
    int len=0;
    f[len++] = 1;
    f[len++] = 2;
    while(1) {
        f[len] = f[len-1]+f[len-2];
        if(f[len] > 1000) {
            break;
        }
        len++;
    }
    
    for(int i=0; i<1003; i++) {
        memset(vis, 0, sizeof(vis));
        for(int j=0; j<len && f[j]<=i; j++) {
            vis[sg[i-f[j]]] = 1;
        }
        for(int j=0; j<=1003; j++) {
            if(!vis[j]) {
                sg[i] = j;
                break;
            }
        }
    }
}

int main ()
{
    Init();
    int m, n, p;
    while(scanf("%d%d%d", &m, &n, &p) != EOF && (m|n|p)) {
        printf("%s\n", sg[m]^sg[n]^sg[p] ? "Fibo":"Nacci");
    }
    
    return 0;
}