#include<bits/stdc++.h>
using namespace std;
char k[100],s[100];
int m,b[20],flag,cha[100],fcha[20],a[30]; 
void p(int x)
{
	if(b[x]>4)
	{
		cout<<"cheat"<<endl;
		flag=1;
	}
}
int main()
{
	freopen("poker1.in","r",stdin);
    freopen("poker1.out","w",stdout);
	cin>>m;
	for(int i=1;i<=m;i++)
	{
		memset(b,0,sizeof(b));
		flag=0;
		int n;
		cin>>n;
		cin.getline(k,100);
		cin.getline(s,100);
		int t=0;
		for(int i=0;;i++)
		{
			if(flag==1)
			{
				break;
			}
			if(t==n)
			{
				break;
			}
			if(s[i]==' ')
			{
				continue;
			}
			if(s[i]=='1'&&s[i+1]=='0')
			{
				t++;
				b[10]++;
				p(10);
				s[i+1]=' ';
				continue;
			}
			if(s[i]=='1'&&s[i+1]=='1')
			{
				t++;
				b[11]++;
				p(11);
				s[i+1]=' ';
				continue; 
			}
			if(s[i]=='1'&&s[i+1]=='2')
			{
				t++;
				b[12]++;
				p(12);
				s[i+1]=' ';
				continue; 
			}
			if(s[i]=='1'&&s[i+1]=='3')
			{
				t++;
				b[13]++;
				p(13);
				s[i+1]=' ';
				continue; 
			}
			if(s[i]=='1')
			{
				t++;
				b[15]++;
				p(15);
				s[i+1]=' ';
				continue; 
			}
			if(s[i]=='2')
			{
				t++;
				b[14]++;
				p(14);
				s[i+1]=' ';
				continue; 
			}
			t++;
			b[s[i]-'0']++;
			p(s[i]-'0');
		}
		if(flag==0)
		{
			for(int j=3;j<=15;j++)
			{
				if(b[j]==4)
				{
					if(j==14){
						cout<<'2'<<endl;
					}else if(j==15){
						cout<<'1'<<endl;
					}else{
						cout<<j<<endl;
					}
					flag=2;
					break;
				}
			}
			if(flag==0)
			{
				cout<<"no bomb"<<endl;
			}
		}
	}
	return 0;
}