using System;
using System.Linq;

class No587
{
    static void Main()
    {
        var str = Console.ReadLine().OrderBy(x => x).ToArray();
        foreach(var a in str){
            Console.WriteLine(a);
        }
        var count=0;
        var ans="";
        for(int i=0;i<13;++i){
            if(str.Contains(str[i])){
             count++;
            }else{
                ans=str[i].ToString();
            }   
        }
        Console.WriteLine(count==12?ans:"Impossible");
    }
}