#include <bits/stdc++.h>
#define pii pair <int, int>

using namespace std;


int t[26];
int tata (int nod)
{
    if(t[nod] == 0 || t[nod] == nod)
        return nod;
    return t[nod] = tata(t[nod]);
}

void unite (int a, int b)
{
    a = tata(a);
    b = tata(b);
    if(a!=b)
        t[a] = b;
}
int sz[26];

int in_comp[30];

char mat[50][50];
vector<pair<int,int>>S;
vector<pair<int,int>>F;
struct ura
{
    int val,pz;
};
vector<ura>v;
bool cmp (ura a, ura b)
{
    return a.val > b.val;
}
void solve() {
    int n;
    cin >> n;
    for(int i = 1 ; i<= n; ++i)
    {
        for(int j = 1; j <= n; ++ j)
        {
            cin >> mat[i][j];
            if(i < j && mat[i][j] != '?')
            {
                if(mat[i][j] == 'S')
                    S.push_back(make_pair(i,j));
                else
                    F.push_back(make_pair(i,j));
            }
        }
    }
    int ok = 0;
    if(S.size() > F.size())
    {
        swap(S,F);
        ok = 1;
    }
    for(auto pi:F) // => intre comp o sa fie toate S
    {
        int a = pi.first, b = pi.second;
        unite(a,b);
    }
    for(int i = 1; i <= n; ++i)
        ++sz[tata(i)];
    for(int i = 1; i <= n; ++i)
    {
        if(i == tata(i))
            v.push_back({sz[i], i});
    }
    sort(v.begin(),v.end(),cmp);
    int s = 0;
    int obj = (n+2)/4;
    for(auto a:v)
    {
        if(s+a.val <= obj)
        {
            s += a.val;
            in_comp[a.pz] = 1;
            //cout << a.pz<<'\n';
        }
    }
    //cout<<s<<'\n';
    for(int i = 1; i <= n; ++i)
    {
        for(int j = 1; j <= n; ++j)
        {
            char ch;
            if(mat[i][j] != '?')
            {
                cout << mat[i][j];
                continue;
            }
            if(in_comp[tata(i)] == in_comp[tata(j)])
                ch = 'S';
            else
                ch = 'F';
            if(ok)
                ch = 'S' + 'F' - ch;
            cout << ch;
        }
        cout << '\n';
    }
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

#ifdef LOCAL
    freopen("test.in", "r", stdin);
    freopen("test.out", "w", stdout);
#else

#endif
    int T = 1;
    //cin >> T;
    while(T--) {
        solve();
    }
    return 0;
}