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

unsigned long long w, n, m;

int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin>>t;
    for(int i=1; i<=t; i++){
        cin>>w;
        cout<<"Case "<<i<<": ";
        if(w%2) cout<<"Impossible";
        else{
            int j=2;
            while(1){
                if(w%j==0 && (w/j)%2){
                cout<<w/j<<' '<<j;
                break;
                }
            j+=2;
            }
        }
        cout<<"\n";
    }

    return 0;
}