#include <bits/stdc++.h>

using namespace std;

#define ll long long int
#define nl endl
#define ss string
#define dl double
#define yes cout << "YES" << nl;
#define no cout << "NO" << nl;


int main() {
    ll t; cin >> t;
while (t--)
    {
        
        /* code */
        int n; cin >> n;
         unordered_set<char> st;
        // for (int j = 0; j < n; j++)
        // {
        //     /* code */
        //     char c; cin >> c;
        //     st.insert(c);
        // }
        // for(auto x : st)
        // {
        //     cout << x;
        // }
        // cout << nl;
        ss s; cin >> s;
        ss ck; ck = "SeriousOJ";
        string ckk="";
        
        for(int i = 0; i < s.size(); i++)
        {
            bool flag= true;
            int n =ckk.length();
            if(s[i] ==  'S' || s[i] == 'e' ||  s[i] == 'r' ||
            s[i] == 'i' || s[i] == 'o' || s[i] == 'u'
            || s[i] == 's' || s[i] == 'O' || s[i] == 'J')
            {
                
                for(int j = n-1; j>=0; j--)
                {
                    if(ckk[j]==s[i])
                    {
                        flag=false;
                        break;
                    }
                }
                if(flag)
                {
                  ckk.push_back(s[i]);
                  //flag=true;

                }
               
              
                
            }
        }

        if(ckk==ck)
        yes
        else
        no

    }
    
    return 0;
}