using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _8.Часовник
{
    class Program
    {
        static void Main(string[] args)
        {

            for ( int chas = 0; chas <= 23; chas++)
            {
                for (int  minuti = 0; minuti<= 59; minuti++)
                {

                    Console.WriteLine($"{chas}:{minuti}");

                }

            }

        }
    }
}