/* 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
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String a = "AABJJKAASSS";
		int dem = 1;
		String b = String.valueOf(a.charAt(0));
		for(int i = 1;i< a.length();i++){
			if (b.equals(String.valueOf(a.charAt(i)))) {
				dem++;
			}
			if (!b.equals(String.valueOf(a.charAt(i))) || i == a.length()-1) {
				if(dem==1) System.out.print(b);
				else {
					System.out.print(dem+""+b);
				}
				dem=1;
				b=String.valueOf(a.charAt(i));
			}
		}
	}
}

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