content: package v113;
  
  import java.io.BufferedReader;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  import java.io.PrintWriter;
  import java.util.Arrays;
  import java.util.StringTokenizer;
  
  public class AlternativeArborescence_UVa11307 {
  
  	static final int INF = (int)1e9;
  	static int [][] children;
  	static int[][] memo;
  	
  	static int dp(int u, int c)
  	{
  		if(memo[c][u] != -1)
  			return memo[c][u];
  		int ret = INF;
  		for(int i = 0; i < 6; ++i)
  			if(i != c)
  			{
  				int cur = i + 1;
  				for(int v: children[u])
  					cur += dp(v, i);
  				ret = Math.min(ret, cur);
  			}
  		return memo[c][u] = ret;
  	}
  	
  	public static void main(String[] args) throws IOException 
  	{
  		Scanner sc = new Scanner(System.in);
  		PrintWriter out = new PrintWriter(System.out);
  		while(true)
  		{
  			int n = sc.nextInt();
  			if(n == 0)
  				break;
  			children = new int[n][];
  			boolean[] root = new boolean[n];
  			Arrays.fill(root, true);
  			for(int i = 0; i < n; ++i)
  			{
  				StringTokenizer st = new StringTokenizer(sc.nextLine());
  				String s = st.nextToken();
  				int u = Integer.parseInt(s.substring(0, s.length() - 1));
  				int k = st.countTokens();
  				children[u] = new int[k];
  				for(int j = 0; j < k; ++j)
  				{	
  					int v = children[u][j] = Integer.parseInt(st.nextToken());
  					root[v] = false;
  				}
  			}
  			memo = new int[7][n];
  			for(int i = 0; i < 7; ++i)
  				Arrays.fill(memo[i], -1);
  			int s = -1;
  			for(int i = 0; i < n; ++i)
  				if(root[i])
  				{
  					s = i;
  					break;
  				}
  			out.println(dp(s, 6));
  		}
  		out.flush();
  		out.close();
  	}
  
  	static class Scanner 
  	{
  		StringTokenizer st;
  		BufferedReader br;
  
  		public Scanner(InputStream s){	br = new BufferedReader(new InputStreamReader(s));}
  
  		public String next() throws IOException 
  		{
  			while (st == null || !st.hasMoreTokens()) 
  				st = new StringTokenizer(br.readLine());
  			return st.nextToken();
  		}
  
  		public int nextInt() throws IOException {return Integer.parseInt(next());}
  
  		public long nextLong() throws IOException {return Long.parseLong(next());}
  
  		public String nextLine() throws IOException {return br.readLine();}
  
  		public double nextDouble() throws IOException
  		{
  			String x = next();
  			StringBuilder sb = new StringBuilder("0");
  			double res = 0, f = 1;
  			boolean dec = false, neg = false;
  			int start = 0;
  			if(x.charAt(0) == '-')
  			{
  				neg = true;
  				start++;
  			}
  			for(int i = start; i < x.length(); i++)
  				if(x.charAt(i) == '.')
  				{
  					res = Long.parseLong(sb.toString());
  					sb = new StringBuilder("0");
  					dec = true;
  				}
  				else
  				{
  					sb.append(x.charAt(i));
  					if(dec)
  						f *= 10;
  				}
  			res += Long.parseLong(sb.toString()) / f;
  			return res * (neg?-1:1);
  		}
  
  
  		public boolean ready() throws IOException {return br.ready();}
  
  	}
  }