How to do assignment 5 on edhesive

//To pass in a string, and pass in a pivot string, and at that moment print in obligatory sequence, the string after pivot string till last as first string, and published beforehand the left slice of string.

import java.util.Scanner;

public class Main {

public static void main(String args[]) {

  Scanner s2 = new Scanner(System.in);

  System.out.println("Enter the parent String:");

  String f2 = s2.nextLine();

  System.out.println("Enter pivot(child string):");

  String piv1 = s2.nextLine();

  int start2 = f2.indexOf(piv1);

  int end2 = piv1.length()+start2;

  if (start2 == -1){

    System.out.println("Error: child string(Pivot) not discovered.");

    return;

}

String first2 = f2.substring(0,start2-1);

  String second2 = f2.substring(end2);

if (f2.charAt(start2-1)==' '){

System.out.println(second2 + " " + piv1 + " " + first2);

return;

}

System.out.println(second2 + piv1 + first2);

}

}

Explanation:

Please check the answer section.

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answer; i believe the correct answer is (a) all trenches must have access/egress;