import java.util.ArrayList;
import java.util.List;

public class Lab1 {

    public static void main(String[] args) {
        List<String> array = new ArrayList();
        int words = 2 + (int) (Math.random() * 29);
        int i = 0;
        while (i < words) {
            int length = 2 + (int) (Math.random() * 9);
            int j = 0;
            String temp = "";
            while (j < length) {
                int RandomSymbol = 97 + (int) (Math.random() * 25);
                temp += (char) (RandomSymbol);
                j++;
            }
            array.add(temp);
            if (i != words - 1) {
                System.out.print(array.get(i) + ",");
            }
            else {
                System.out.println(array.get(i) + ".");
            }
            i++;
        }
        i = 0;
        for (i = 0; i < array.size(); i++) {
            array.set(i, swap(array.get(i)));
            if (i != words - 1) {
                System.out.print(array.get(i) + ",");
            }
            else {
                System.out.println(array.get(i) + ".");
            }
        }
    }

    public static String swap(String a) {
        int length = a.length();
        char[] array = a.toCharArray();
        for (int i = 0; i  < length - 1; i++ ) {
            char temp = array[i];
            array[i] = array[i + 1];
            array[i + 1] = temp;
        }
        a = new String(array);
        return a;
    }

}