#include <stdio.h>

#include <string.h>

void main()
{
    char s[256] = "aaaabgggggeffff";

    int j, k, i;

    for (i = 0; i < strlen(s); i++)
    {
        k = 1;
        for (j = i + 1; j < strlen(s); j++)
        {
            if (s[i] == s[j])
            {
                k++;
                i++;
            }
        }
        printf("%d", k);
        printf("%c\n", s[i]);




    }
}