#include<bits/stdc++.h>

using namespace std;

int main()
{

    int a,b,rev=0,rem,n;
    cin>>a;
    for(int i=1;i<=a;i++)
    {
        cin>>n;
        while(n!=0)
        {
            b=n;
            rem=n%10;
            rev=rev*10+rem;
            n=n/10;

        }
        if (rev == b)
        {
            cout<<"Case "<<i<<": Yes\n";
        }
        else
        {
            cout<<"Case "<<i<<": No\n";
        }

    }


    return 0;
}