/****************************************************************************************************************
 Program: loops.java - This program performs word-in-a-box string mutations via loops.
 Author: Dave Aldrich
 Date: March 20, 2018
 ***************************************************************************************************************/


import java.lang.*;
import java.util.*;

public class loops {
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        String inputStr = "";    // user input
        String lineStore = "";   // used for any arbituary length of string
        String outputStr = "";   // output string after mutations
        String spaceStr = " ";   // whitespace string; length determined by spaceStore ***see the 2nd spaceStr doc***
        int spaceStore = 0;     // stores the number of whitespaces in a mutated string, -2 because the last space
                                 // and character aren't needed


        p("Enter a string: "+inputStr);
        inputStr = scan.nextLine();
        lineStore = inputStr.toUpperCase();

        int r=lineStore.length();        // r stands for range

        for(int i=0; i < r; i++){
            outputStr = lineStore.charAt(i) + " ";
            p(outputStr);
            spaceStore++;            // this will count how many spaces added
        }


        /*
          Makes another spaceStr obj but with repeated whitespaces using replace method.
          To clear up: the string is created using an array of null chars, but the nulls
          are replaced with the whitespace which was used to initialize spaceStr.
        */

        spaceStr = new String(new char[spaceStore*2-3]).replace("\0", spaceStr);

        for(int i=0; i < r-1; i++){
            if(i != 0){
                outputStr = lineStore.charAt(i)+spaceStr+lineStore.charAt(r - i-1);    // takes first char, adds
                p("\n"+outputStr);                                                     // spaceStr, and adds last char
            }
            if(i == r-2){    // adds a line break for the last line
                pl("");
            }
        }
        for(int i=r-1; i >= 0; i--){    // reverses string order
            outputStr = lineStore.charAt(i) + " ";
            p(outputStr);
        }

    }
    public static void p(String a) {    //print method
        System.out.print(a);
        return;
    }
    public static void pl(String a) {   //println method
        System.out.println(a);
        return;
    }
}