#include<stdio.h>
#include<string.h>
int main()
{
	char s[100005];
	scanf("%s", s);
	int i, n = strlen(s);
	int c, w;
	c = 0;
	w = 0;
	for (i = 0; i < n; i++)
	{
		if (s[i] == 'c')
			c++;
		else
			w++;
	}
	if (c - 1 < w)
		printf("%d\n", c - 1);
	else
		printf("%d\n", w);
	return 0;
}