#include <iostream>

#include <iostream>
#include <cstring>
using namespace std;
int t;
int n,cnt = 0;
int flag = 0;
string s;
int main()
{
cin >> t;
while(t--)
{
cin>>n;
cin>>s;
flag = 0;
cnt = 0;
for(int i=0;i<n;i++)
{
if(cnt0&&s[i]!='M'&&s[i]!='m')
{
if(s[i]'e'||s[i]'E') cnt++;
else
{
flag=1;
break;
}
}
if(cnt1&&s[i]!='e'&&s[i]!='E')
{
if(s[i]'o'||s[i]'O')cnt++;
else
{
flag=1;
break;
}
}
if(cnt2&&s[i]!='o'&&s[i]!='O')
{
if(s[i]'W'||s[i]'w')cnt++;
else
{
flag=1;
break;
}
}
if(cnt3&&s[i]!='w'&&s[i]!='W')
{
flag=1;
break;
}

	}
    
	if(cnt==3&&flag==0)
        cout<<"YES" << endl;
	else     cout<<"NO" << endl;
}
return 0;

}