#include <stdio.h>

int main()
{
 int i, counter = 0, koniec = 1;
 char c, q = 0;

 while(koniec == 1)
 {

    if ((c = getchar()) <= 0)
     {
         koniec = 0;

       /*   if (counter <= 2)
            for(i = 0; i < counter; i++)
            printf("%c", q);
        else
            printf("%d%c", counter, q);
            */
     }
    // else
    //{
        if(c == 10 || c == 13)
            continue;
    //}

    if((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
    {
        if(c == q)
            counter++;

        else
        {
            if (q == 0)
            {
                q = c;
                counter = 1;
            }
            else
            {
                if (counter <= 2)
                    for(i = 0; i < counter; i++)
                        printf("%c", q);
                else
                    printf("%d%c", counter, q);
                q = c;
                counter = 1;
            }
        }
     }
}

    /*if (counter <= 2)
        for(i = 0; i < counter; i++)
            printf("%c", q);
        else
            printf("%d%c", counter, q);*/

  return 0;
}