#include <stdio.h>

int main()
{
   	int i = 0, count = 0, count1 = 0;
    char a[] = "dppccddd";
    for (i = 0; i <= 6; i++)
    {
    	if (a[i] == a[i + 1])
    	count++;
    }
    printf("%d", count);
    
    return 0;
}