import java.util.*;

public class Zipper {

    public String zipString(String str) {

        // write code here

       if(str.length() == 0 ) return str;

        int flag = 0;

        int num = 1;

        StringBuffer sb = new StringBuffer();

        char tmp = str.charAt(0);

        for(int i = 1; i < str.length(); i++){

            if(str.charAt(i) == tmp){

                num++;

                flag = 1;

            }

            else{

                sb.append(tmp);

                sb.append(num);

                tmp = str.charAt(i);

                num = 1;

            }

        }

        sb.append(tmp);

        sb.append(num);

        if(flag == 0 || sb.length() >= str.length()) return str;

        else return sb.toString();

    }

}