#include<bits/stdc++.h>
using namespace std;
 
int main()
{
    int k;
    scanf("%d",&k);
    for(int cs=1; cs<=k; cs++){
        int arr[110]={0};
 
        int mx = 0;
 
        int n;
        scanf("%d",&n);
        while(n--){
            int a;
            scanf("%d",&a);
            arr[a]++;
            if( (arr[a]>arr[mx]) || (arr[a]==arr[mx] && mx<a) ) {
                mx = a;
            }
        }
 
        printf("Case %d: %d %d\n",cs,mx,arr[mx]);
 
    }
 
    return 0;
}
 

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