#include<bits/stdc++.h>
#define pb push_back
#define sz(x) (int)(x).size()
#define f first
#define s second
#define ll long long
using namespace std;

int main(){
    int n;
    scanf("%i",&n);
    vector<string> a(n);
    vector<bool> taken(n);
    for(int i=0;i<n;i++){
        cin >> a[i];
        for(int j=0;j<n;j++){
            if(a[i][j]!='?'&&i!=j){
                taken[i]=taken[j]=1;
            }
        }
    }
    if(n==2&&taken[0]){
        for(int i=0;i<n;i++){
            cout << a[i] << endl;
        }
        return 0;
    }
    vector<int> group;
    vector<bool> inGroup(n);
    int need=n/4;
    if(n%4)need++;
    for(int i=0;i<n;i++){
        if(!taken[i]){
            group.pb(i);
            inGroup[i]=1;
            need--;
            if(need==0)break;
        }
    }
    assert(need==0);
    for(int i=0;i<n;i++){
        for(int j=0;j<n;j++){
            if(i==j)continue;
            if(a[i][j]!='?')continue;
            if(inGroup[i]||inGroup[j]){
                a[i][j]='F';
            }
            else{
                a[i][j]='S';
            }
        }
    }
    for(int i=0;i<n;i++){
        cout << a[i] << endl;
    }
}