#include <bits/stdc++.h>
using namespace std;
#define optimize() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define ll long long
#define endl '\n'
#define gap " "
#define bug(a) cerr<<#a<<":"<<a<<endl;
#define gcd __gcd(a,b)
#define lcm (a*b)/(__gcd(a,b))
#define pb push_back
#define yes cout<<"YES"<<endl;
#define no cout<<"NO"<<endl;
const double pi=acos(-1);
const ll mod=1000000007;
#define tc ll t;cin>>t;while(t--)
int main()
{
    optimize()
    tc
    {
        ll n;
        cin>>n;
        string s;
        cin>>s;
       
        // for(i=0; i<n; i++)
        // {
        //     if(s[i]=='S')
        // }
        ll i;
        ll c=0;
        
        for(i=0;i<n;i++)
        {
            if(c==0){
                if(s[i]=='S')c++;
            }
            else if(c==1){
                if(s[i]=='e')c++;
            }
            else if(c==2){
                if(s[i]=='r')c++;
            }
            else if(c==3){
                if(s[i]=='i')c++;
            }
            else if(c==4){
                if(s[i]=='o')c++;
            }
            else if(c==5){
                if(s[i]=='u')c++;
            }
            else if(c==6){
                if(s[i]=='s')c++;
            }
            else if(c==7){
                if(s[i]=='O')c++;
            }
            else if(c==8){
                if(s[i]=='J')c++;
            }

        }
        if(c==9)yes 
        else no
       
    }
}