import java.util.Scanner;
public class yuki2 {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		String S = sc.nextLine();
		String IJ = sc.nextLine();
		
		String[] S2 = new String[S.length()];
		String[] IJ2 = new String[1];
		
		S2 = S.split("");
		IJ2 = IJ.split(" ");
		
		String BOX = null ; 
		BOX = S2[Integer.parseInt(IJ2[0])];
		S2[Integer.parseInt(IJ2[0])] = S2[Integer.parseInt(IJ2[1])];
		S2[Integer.parseInt(IJ2[1])] = BOX;
		
		for(int i = 0;i<S2.length;i++) {
			System.out.print(S2[i]);
			
		}
		
	}

}