#include<cstdio>
#include<iostream>
#define RI register int
#define CI const int&
using namespace std;
const int N=5005;
int n,deg[N],vis[N],key[N]; char s[N][N];
int main()
{
    scanf("%d",&n);
    for (RI i=1;i<=n;++i) scanf("%s",s[i]+1);
    for (RI i=1;i<=n;++i) for (RI j=1;j<=n;++j)
    if (s[i][j]=='1') ++deg[i];
    int A=1,B=-1,C=-1; for (RI i=2;i<=n;++i) if (deg[i]>deg[A]) A=i;
    if (deg[A]==n-1) return puts("NOT FOUND"),0;
    for (RI i=1;i<=n;++i) if (s[i][A]=='1') vis[i]=1,B=i;
    if (B==-1) return puts("NOT FOUND"),0;
    for (RI i=1;i<=n;++i) deg[i]=0;
    for (RI i=1;i<=n;++i) for (RI j=1;j<=n;++j)
    if (vis[i]&&vis[j]&&s[i][j]=='1') ++deg[i];
    for (RI i=1;i<=n;++i) if (vis[i]&&deg[i]>deg[B]) B=i;
    for (RI i=1;i<=n;++i) if (s[i][B]=='1') key[i]=1,C=i;
    for (RI i=1;i<=n;++i) deg[i]=0;
    for (RI i=1;i<=n;++i) for (RI j=1;j<=n;++j)
    if (key[i]&&key[j]&&s[i][j]=='1') ++deg[i];
    for (RI i=1;i<=n;++i) if (key[i]&&deg[i]>deg[C]) C=i;
    if (C==-1) return puts("NOT FOUND"),0;
    return printf("%d %d %d",A,B,C),0;
}