
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cmath>
#include<math.h>
#include<string>
#include<string.h>
#include<stack>
#include<queue>
#include<vector>
#include<utility>
#include<set>
#include<map>
#include<stdlib.h>
#include<iomanip>

using namespace std;

#define ll long long
#define ld long double
#define EPS 0.0000000001
#define INF 1e9
#define MOD 1000000007
#define rep(i,n) for(i=0;i<n;i++)
#define loop(i,a,n) for(i=a;i<n;i++)
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)

typedef vector<int> vi;
typedef pair<int,int> pii;

int main(void) {
  int i,j,k;
  int n;
  cin>>n;
  rep(i,n){
    int a;
    cin>>a;
    cout<<"Case "<<i+1<<":"<<endl;
    rep(j,10){
      a=a*a;
      vi v(8);
      rep(k,8){
	v[k]=a%10;
	a/=10;
      }
      a=0;
      int t=1;
      rep(k,4){
	a+=v[2+k]*t;
	t*=10;
      }
      cout<<a<<endl;
    }
  }
}