#include<iostream>
#include<queue>
#include<algorithm>
#include<cstdio>
#include<memory.h>
#include<string>
using namespace std;
int tu[100000];
int main()
{
int T;
cin >> T;
int u = 0;
while (T--)
{
memset(tu, 0, sizeof(tu));
int n;
cin >> n;
int zhong = 0;
int sum = 0;
for (int a = 0;a < n;a++)
{
int u;
scanf("%d", &u);
if (tu[10000 - (100 - u)*(100 - u)] == 0)zhong++;
tu[10000 - (100 - u)*(100 - u)] ++;
sum = max(tu[10000 - (100 - u)*(100 - u)], sum);
}
int zhong1 = 0;
printf("Case #%d:\n", ++u);
for (int a = 0;a <= 10000;a++)
{
if (tu[a] == sum)zhong1++;
}
if (zhong1 == zhong&&zhong != 1)
{
printf("Bad Mushroom\n");
}
else
{
int tt = 0;
for (int a = 0;a <= 10000;a++)
{
if (tu[a] == sum)
{
if (tt == 0)
{
cout << a;
tt = 1;
}
else cout << " " << a;
}
}
cout << endl;
}
}
return 0;
}