#include <LiquidCrystal.h>

const int RS_Pin1 = A3;
const int EN_Pin1 = A4;
const int D4_Pin = 13;
const int D5_Pin = 12;
const int D6_Pin = 11;
const int D7_Pin = 10;

const int RS_Pin2 = 7;
const int EN_Pin2 = 6;

LiquidCrystal lcd1(RS_Pin1, EN_Pin1, D4_Pin, D5_Pin, D6_Pin, D7_Pin);
LiquidCrystal lcd2(RS_Pin2, EN_Pin2, D4_Pin, D5_Pin, D6_Pin, D7_Pin);

String strings[3] = {"Nursultan", "Amrin", "IT3-2203"};

void setup() {
  lcd1.begin(20, 4);
  lcd2.begin(16, 2); 

  randomSeed(analogRead(0));

  for (int i = 0; i < 3; i++) {
    strings[i] = shuffleString(strings[i]);
  }

  displayStrings(&lcd1, strings, 0, 2);

  displayStrings(&lcd2, strings, 2, 0);
}

void loop() {
}

String shuffleString(String input) {
  int length = input.length();
  for (int i = length - 1; i > 0; i--) {
    int j = random(i + 1);
    char temp = input[i];
    input[i] = input[j];
    input[j] = temp;
  }
  return input;
}

void displayStrings(LiquidCrystal* lcd, String data[], int start, int end) {
  int step = (start <= end) ? 1 : -1;
  int index = 0;
  for (int i = start; step > 0 ? i <= end : i >= end; i += step) {
    lcd->setCursor(0, index++);
    lcd->print(data[i]);
  }
}