using System;
using System.Linq;

class Program
{
    public void Solve()
    {
        string S = Console.ReadLine();
        int[] ij = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
        char w = S[ij[0]];
        string retVal = S.Substring(0, ij[0]) + S.Substring(ij[1], 1) + S.Substring(ij[0] + 1);
        retVal = retVal.Substring(0, ij[1]) + w + retVal.Substring(ij[1] + 1);
        Console.WriteLine(retVal);
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}