using System;
using System.IO;
using System.Diagnostics;

namespace huita
{
    class Program
    {
        static void Main()
        {


            //variables:
            string[] allFilesLines = File.ReadAllLines("input.txt");
            char[] stringS = allFilesLines[0].ToCharArray();

            for (int i = 2; i < allFilesLines.Length; ++i)
            {
                ReverseCase(stringS, Int32.Parse(allFilesLines[i].Split()[0]), Int32.Parse(allFilesLines[i].Split()[1]));
            }

            File.WriteAllText("output.txt", new string(stringS));


        }

        static void ReverseCase(char[] array, int startIndex, int stopIndex)
        {
            for (int i = startIndex - 1; i < stopIndex; ++i)
            {
                if (char.IsLower(array[i]))
                {
                    array[i] = char.ToUpper(array[i]);
                }
                else
                {
                    array[i] = char.ToLower(array[i]);
                }
            }
        }
    }
}