package Q1;

import java.util.ArrayList;
import java.util.Scanner;

public class ReversedSentence {
  public static String change5thPosition(String s) {
    char[] result = new char[s.length()];

    for (int i = 0; i < s.length(); i++) result[i] = (i > 0 && i % 5 == 0) ? 'z' : s.charAt(i);

    return new String(result);
  }

  public static String printChar2DArray(char[][] arr) {
    String[] strings = new String[arr.length];

    for (int i = 0; i < arr.length; i++) strings[i] = new String(arr[i]);
    return String.join(System.lineSeparator(), strings);
  }

  public static String reverseByCharacter(String s) {
    char[] result = new char[s.length()];
    int length = s.length();

    for (int i = 0; i < length; i++) result[length - i - 1] = s.charAt(i);

    return new String(result);
  }

  public static String reverseByWord(String s) {
    String[] words = s.split(" ");
    String[] result = new String[words.length];

    for (int i = 0; i < words.length; i++) {
      String word = words[i];
      result[words.length - i - 1] = word;
    }
    return String.join(" ", result);
  }

  public static String truncateSentence(String s) {
    return s;
  }

  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    String[] sentences = new String[3];

    for (int i = 0; i < 3; i++) {
      System.out.println(String.format("Enter sentence %d: ", i + 1));
      sentences[i] = ReversedSentence.truncateSentence(in.nextLine());
    }

    char[][] matrix = new char[3][80];
    matrix[0] = ReversedSentence.reverseByCharacter(sentences[0]).toCharArray();
    matrix[1] = ReversedSentence.reverseByWord(sentences[1]).toCharArray();
    matrix[2] = ReversedSentence.change5thPosition(sentences[2]).toCharArray();

    System.out.println();
    System.out.println("Result: ");
    System.out.println();
    System.out.print(ReversedSentence.printChar2DArray(matrix));

    System.out.println();
    System.out.println();
    System.out.println("Bye");
  }
}