#include<iostream>
using namespace std;
char x[4]={'m','e','o','w'};
int main()
{
	int T;
	cin>>T;
	while(T--){
		int n,cnt=0,f=1;
		string a;
		cin>>n>>a;
		for(int i=0;i<n;){
			if(a[i]==x[cnt]||a[i]+32==x[cnt]) i++;
			else {
				if(a[i]==x[cnt+1]||a[i]+32==x[cnt+1]) cnt++;
				else {
					f=0;
					cout<<"NO"<<endl;
					break;	
				}
			}
		}
		if(f) cout<<"YES"<<endl;
	}
	return 0;
}