#include<bits/stdc++.h>
using namespace std;

int main()
{
    int t,i;
    cin>>t;
    for(i=1;i<=t;i++)
    {
        string s,c;
        cin>>s;
        c=s;
        reverse(s.begin(),s.end());
        if(s==c)
           cout<<"Case "<<i<<": "<<"Yes"<<endl;
        else
           cout<<"Case "<<i<<": "<<"No"<<endl;
}
}