#include<stdio.h>
#include<string>
#include<iostream>
int main()
{
	std::string i;
	int a, b;
	char c;
	std::cin>>i;
	std::cin>>a;
	std::cin>>b;
	c = i[a];
	i[a] = i[b];
	i[b] = c;
	std::cout << i;
	return 0;
}