#include <iostream>
#include <cstring>
#include <cstdio>
#include <string>
using namespace std;
int a[10010];
int cnt = 0, T, N;
int main(){
	scanf("%d", &T);
	while(T--){
		memset(a, 0, sizeof(a));
		cnt++; printf("Case #%d:\n", cnt);
		
		scanf("%d", &N);
		int temp, max = 0;
		int mark = N;
		while(N--){
			scanf("%d", &temp);
			a[10000-(100-temp)*(100-temp)]++;
		}
	
		for(int i = 0; i <= 10000; i++){
			if(a[i] > max)  max = a[i];
		}
		int cnt2 = 0;
		for(int i = 0; i <= 10000; i++){
			if(a[i] == max) cnt2++; 
		}
		if(cnt2*max == mark && cnt2 > 1) printf("Bad Mushroom\n");
		else{
			bool flag2 = false;
			for(int i = 0; i <= 10000; i++){
				if(a[i] == max) {
					if(flag2 == false){
						printf("%d", i); flag2 = true;
					}
					else printf(" %d", i);
				}
			}
			printf("\n");
		}
		
	}
	
	return 0;
}