#include<iostream>
#include<cstdio>
using namespace std;

int main()
{
    long long n,tst,c;
    cin>>tst;
    for(int i=1;i<=tst;i++)
    {
        cin>>n;
        c=0;
        while(n!=0)
        {
            if(n%2==1)
                c++;
            n/=2;
        }
        if(c%2==1)
        printf("Case %d: odd\n",i);
        else
        printf("Case %d: even\n",i);
    }
    return 0;
}