content: package v110;
  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 Rendezvous_UVa11015 {
  
  	static final int INF = (int)1e8;
  	static int N;
  	static int[][] adjMat;
  	
  	static void floyd()
  	{
  		for(int k = 0; k < N; k++)
  			for(int i = 0; i < N; i++)
  				for(int j = 0; j < N; j++)
  					adjMat[i][j] = Math.min(adjMat[i][j], adjMat[i][k] + adjMat[k][j]);
  	}
  	
  	static int sum(int dest)
  	{
  		int ans = 0;
  		for(int i = 0; i < N; i++)
  			ans += adjMat[i][dest];
  		return ans;
  	}
  	public static void main(String[] args) throws IOException 
  	{
  		
  		Scanner sc = new Scanner(System.in);
  		PrintWriter out = new PrintWriter(System.out);
  		
  		int k = 1;
  		while(true)
  		{
  			N = sc.nextInt();
  			if(N == 0) break;
  			int m = sc.nextInt();
  			
  			String[] names = new String[N];
  			for(int i = 0; i < N; i++) names[i] = sc.next();
  			
  			adjMat = new int[N][N];
  			for(int i = 0; i < N; i++)
  			{
  				Arrays.fill(adjMat[i], INF);
  				adjMat[i][i] = 0;
  			}
  			while(m-->0)
  			{
  				int u = sc.nextInt() - 1, v = sc.nextInt() - 1;
  				adjMat[u][v] = adjMat[v][u] = sc.nextInt();
  			}
  			floyd();
  			int min = INF, idx = -1;
  			for(int i = 0; i < N; i++)
  			{
  				int cur = sum(i);
  				if(cur < min || cur == min && names[i].compareTo(names[idx]) < 0)
  				{
  					idx = i;
  					min = cur;
  				}
  			}
  			out.printf("Case #%d : %s\n", k++, names[idx]);
  		}
  		out.flush();
  	}
  	
  	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();}
  
  		int countTokens() throws IOException
  		{
  			st = new StringTokenizer(br.readLine());
  			return st.countTokens();
  		}
  	}
  }
  