import java.util.Scanner;

class RunLengthCode {

    String pText;
    String cText;

    RunLengthCode() {
        pText = "";
        cText = "";
    }
    void setPText(String txt) {
        pText = txt;
    }

    void setCText(String txt) {
        cText = txt;
    }

    String getPText() {
        return pText;
    }

    String getCText() {
        return cText;
    }

    void compress() {
        String ch = "";
        ch += pText.charAt(0);
        int cnt = 1;
        for(int i = 0; i < pText.length()-1; i++) {
            if(pText.charAt(i) == pText.charAt(i)+1)
                cnt++;
            else {
                if(cnt > 2) {
                    ch += ch.charAt(i+1);
                    ch += cnt;
                }
                else {
                    if(cnt == 2) {
                        ch += pText.charAt(i);
                        ch += pText.charAt(i);
                    }
                    else if (cnt == 1)
                        ch += pText.charAt(i);
                }
                cnt = 1;
            }
        }
        ch += pText.charAt(pText.length()-1);
        ch += cnt;
    }

    void decompress() {


    }
}
public class Hw9 {

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

        String pText, cText;

        System.out.print("Enter a plain text consisting of only lower-case alphabets and spaces:");
        pText = in.nextLine();
        myC.setPText(pText);
        myC.compress();
        System.out.println(pText+" => "+myC.getCText());

        System.out.print("Enter a compressed text consisting of only lower-case alphabets, spaces and digits:");
        cText = in.nextLine();
        myC.setCText(cText);
        myC.decompress();
        System.out.println(cText+" => "+myC.getPText());


    }

}