/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    static void codieren(String s){
        int Zähler = 0;
        char[] a = s.toUpperCase().toCharArray();
        for (int i = 0; i<s.length()-2; i++){
            if (a[i] == a[i+1] && a[i] ==a[i+2]){
                Zähler = 3;
                while ((i+Zähler) < s.length() && a[i] == a[i+Zähler]) {
                	Zähler++;
            	}
                i = i + Zähler - 1;
            }
            System.out.print(a[i]);
            if (Zähler != 0) {
            	System.out.print(String.valueOf(Zähler));
            }
        }
    }
 
	public static void main (String[] args) throws java.lang.Exception
	{
        //Out.println("Geben sie eine Reihenfolge von Buchstaben ein!");
        //Instead of reading, I'm just going to hard-code it. You don't need to do that.
        //String s = In.readString();
        String s = "abbcccdddd";
        //Out.println("Die Codierung lautet:");
        try {
        codieren(s);
        } catch (Exception e) {
        	e.printStackTrace(System.out);
        }
	}
}

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