#include<bits/stdc++.h>
using namespace std;
int n,num=1;
string s[10005];
int main()
{
    scanf("%d",&n);
    for(int i=1; i<=n; i++)
    {
        scanf("%s",&s[i]);
        for(int j=0; j<16; j++)
        {
            if(s[i][j]==s[i][j+1])
            {
                num++;
            }
            else 
            {
                num=1;
            }
            if(num==4 || (s[i][j]=='D'&&s[i][j+1]=='X'))
            {
                cout<<"yes"<<endl;
                break;
            }
        }
        cout<<"no"<<endl;
    }
    return 0;
}