object Main{
	def main(args:Array[String]){
		val s = new java.util.Scanner(System.in)
		val a = s.next.toCharArray;
		val i,j=s.nextInt;
		val t=a(i);
		a(i)=a(j);
		a(j)=t;
		println(new String(a))
	}
}