#include <stdio.h>

int main(){
	char S[100001];
	scanf("%s",S);

	int count_c,count_w;
	int i = 0;
	while(1){
		if(S[i]=='\0')
			break;
		else if(S[i]=='c')
			count_c++;
		else
			count_w++;
		i++;
	}
	if(count_w >= count_c)
		printf("%d\n", count_c-1);
	else
		printf("%d\n", count_w);
	return 0;
}