#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
using namespace std;
int n,a[30],b[30];
int mp[]={0,3,4,5,6,7,8,9,10,11,12,13,2,1};
int main()
{
	freopen("poker1.in","r",stdin);
	freopen("poker1.out","w",stdout);
	int T;
	scanf("%d",&T);
	for(int I=1;I<=T;I++)
	{
		scanf("%d",&n);
		memset(b,0,sizeof(b));
		int t;
		for(int i=1;i<=n;i++)
		{
		    scanf("%d",&t);
		    b[t]++;
		}
		int ans=0;
		for(int i=1;i<=13;i++)
		{
			if(b[mp[i]]>4)
			{
				ans=-1;
				break;
			}
			if(b[mp[i]]==4&&!ans)ans=mp[i];
		}
		if(ans==-1)printf("cheat\n");
		else
		if(ans==0)printf("no bomb\n");
		else printf("%d\n",ans);
	}
	return 0;
}