#include<bits/stdc++.h>

using namespace std;

#define il inline

#define gc getchar()

#define ri register int

#define rb register bool

#define rc register char

#define rp(i,x,y) for(ri i=x;i<=y;++i)

const int N=+;

int f[N],sg[N];

bool gdgs=,vis[N];

il int read()

{

    rc ch=gc;ri x=;rb y=;

    while(ch!='-' && (ch>'' || ch<''))ch=gc;

    if(ch=='-')ch=gc,y=;

    while(ch>='' && ch<='')x=(x<<)+(x<<)+(ch^''),ch=gc;

    return y?x:-x;

}

il void pre()

{

    f[]=;f[]=;rp(i,,)f[i]=f[i-]+f[i-];

    rp(i,,){for(ri j=;f[j]<=i;++j)vis[sg[i-f[j]]]=;ri tmp=;while(vis[tmp])++tmp;sg[i]=tmp;for(ri j=;f[j]<=i;++j)vis[sg[i-f[j]]]=;}

}

int main()

{

//    freopen("1848.in","r",stdin);freopen("1848.out","w",stdout);

    pre();

    while(gdgs){ri m=read(),n=read(),p=read();if(!m && !n && !p)return ;printf(sg[m]^sg[n]^sg[p]?"Fibo\n":"Nacci\n");}

    return ;

}