#include <bits/stdc++.h>
using namespace std;
#define pb push_back
vector< vector<int> >adj;
int parent[1009][20],level[1009];
void dfs(int s,int p)
{
	for(int i=0;i<adj[s].size();i++)
	{
 
		if(adj[s][i]!=p)
		{
			level[adj[s][i]]=level[s]+1;
			parent[adj[s][i]][0]=s;
			dfs(adj[s][i],s);
		}
	}
}
int main() {
int t;
cin>>t;
while(t--)
{
	int m,i,n,j,x;
	cin>>n;
	adj.resize(n+1);
	for(i=0;i<n;i++)
	{
		cin>>m;
 
		for(j=0;j<m;j++)
		{
			cin>>x;
			adj[i].pb(x-1);
			adj[x-1].pb(i);
		}
	}
	dfs(0,-1);
 
		for(j=0;(1<<j)<n;j++)
		{
				for(i=n-1;i>=0;i--){
				parent[i][j+1]=parent[parent[i][j]][j];}
		}
 
	cout<<level[8];
}
}

I2luY2x1ZGUgPGJpdHMvc3RkYysrLmg+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CiNkZWZpbmUgcGIgcHVzaF9iYWNrCnZlY3RvcjwgdmVjdG9yPGludD4gPmFkajsKaW50IHBhcmVudFsxMDA5XVsyMF0sbGV2ZWxbMTAwOV07CnZvaWQgZGZzKGludCBzLGludCBwKQp7Cglmb3IoaW50IGk9MDtpPGFkaltzXS5zaXplKCk7aSsrKQoJewoJCQoJCWlmKGFkaltzXVtpXSE9cCkKCQl7CgkJCWxldmVsW2FkaltzXVtpXV09bGV2ZWxbc10rMTsKCQkJcGFyZW50W2FkaltzXVtpXV1bMF09czsKCQkJZGZzKGFkaltzXVtpXSxzKTsKCQl9Cgl9Cn0KaW50IG1haW4oKSB7CmludCB0OwpjaW4+PnQ7CndoaWxlKHQtLSkKewoJaW50IG0saSxuLGoseDsKCWNpbj4+bjsKCWFkai5yZXNpemUobisxKTsKCWZvcihpPTA7aTxuO2krKykKCXsKCQljaW4+Pm07CgkJCgkJZm9yKGo9MDtqPG07aisrKQoJCXsKCQkJY2luPj54OwoJCQlhZGpbaV0ucGIoeC0xKTsKCQkJYWRqW3gtMV0ucGIoaSk7CgkJfQoJfQoJZGZzKDAsLTEpOwoKCQlmb3Ioaj0wOygxPDxqKTxuO2orKykKCQl7CgkJCQlmb3IoaT1uLTE7aT49MDtpLS0pewoJCQkJcGFyZW50W2ldW2orMV09cGFyZW50W3BhcmVudFtpXVtqXV1bal07fQoJCX0KCQoJY291dDw8bGV2ZWxbOF07Cn0KfQ==

MQoxMQozIDIgMyA0CjAKMyA1IDYgNwowCjAKMiA4IDkKMiAxMCAxMQowCjAKMAow

1
11
3 2 3 4
0
3 5 6 7
0
0
2 8 9
2 10 11
0
0
0
0