import java.io.*;
import java.util.*;
import java.awt.*;

class lotto_judge
{
    public Scanner sc;
    public PrintStream ps;

    public String toString()
    {
        return "lotto_judge";
    }

    public void doit() throws Exception
    {
        sc = new Scanner( System.in );
        ps = System.out;

        for(;;)
        {
            // Read the number of tickets, break if at end.
            int n = sc.nextInt();
            if( n==0 ) break;

            // 'unseen' will be the count of numbers which haven't been seen.
            // Initially, there are 49 numbers we haven't seen.
            // Fred has covered all his bases if unseen==0
            int unseen = 49;

            // Keep track of which numbers we've seen. Initially, we haven't seen any.
            boolean seen[] = new boolean[50];
            Arrays.fill( seen, false );

            // Tickets really aren't important - there are just 6n numbers to look at.
            for( int i=0; i<n*6; i++ )
            {
                int j = sc.nextInt();

                // If we haven't seen this one yet...
                if( !seen[j] )
                {
                    // Mark it as seen
                    seen[j] = true;

                    // That's one more taken from the 'unseen' column!
                    --unseen;
                }
            }

            // Are there any numbers left unseen?
            ps.println( unseen==0 ? "Yes" : "No" );
        }
    }

	public static void main(String[] args) throws Exception
	{
		new lotto_judge().doit();
	}
}