B

#include <bits/stdc++.h>

using namespace std;

#define _test   int _TEST; cin>>_TEST; while(_TEST--)
#define pb     push_back

int main()
{
    _test
    {
        int n;
        string s;
        cin>>n>>s;

        string ans = "";

        int want = n/2 + 1;
        int rem = n;

        for(auto e: s)
        {
            rem--;

            if(rem >= want)
            {
                ans.pb('P');
                if(e == 'R')        want--;
            }
            else
            {
                if(e == 'R')
                    ans.pb('P');

                if(e == 'P')
                    ans.pb('S');

                if(e == 'S')
                    ans.pb('R');

                want--;
            }
        }

        cout<<ans<<"\n";
    }
}