using System;
using System.Collections.Generic;
using System.Text;
public partial class Solution
    {
        public IList<string> RestoreIpAddresses(string s)
        {
            IList<string> result = new List<string>();

            if (string.IsNullOrEmpty(s)) return result;

            if (s.Length < 4 || s.Length > 12) return result;

            Backtrack(result, s, 0, new StringBuilder(), 0);

            return result;
        }

        private void Backtrack(IList<string> candidates, string numbers, int segPos, StringBuilder curr, int numSegments)
        {
            if (numSegments == 4)
            {
                candidates.Add(curr.ToString());
                return;
            }

            if (numSegments == 2 && numbers.Length - segPos > 6) return;

            if (numSegments == 3 && numbers.Length - segPos > 3) return;


            for(int tries = 0; tries < 3; tries++)
            {
                int nextPos = tries + 1;

                if (segPos + nextPos > numbers.Length) break;
                if (numSegments == 3 && segPos + nextPos != numbers.Length) continue;

                string newSegment = numbers.Substring(segPos, nextPos);

                if (!IsSegmentValid(newSegment)) continue;

                curr.Append(newSegment);
                if (numSegments + 1 != 4)
                    curr.Append('.');

                Backtrack(candidates, numbers, segPos + nextPos, curr, numSegments + 1);

                curr.Length -= newSegment.Length;
                if (numSegments + 1 != 4)
                    curr.Length -= 1;
            }
        }

        private bool IsSegmentValid(string s)
        {
            if (string.IsNullOrEmpty(s)) return false;
            if (s.Length < 0 || s.Length > 3) return false;

            int intVal;

            if (!int.TryParse(s, out intVal))
                return false;

            if (intVal.ToString().Length != s.Length) return false; // example: "000" converted to 0

            return intVal >= 0 && intVal <= 255;
        }
        static void Main()
        {
          string testString;
          testString = Console.ReadLine();
          Solution sol = new Solution();
          IList<string> res = sol.RestoreIpAddresses(testString);
          foreach (var p in res) {
            Console.WriteLine(p);
          }  
        }
    }