#include <iostream>
#include <cstdio>
#include <vector>
#include <cmath>
#include <cstring>
#include <numeric>
#include <algorithm>
#include <functional>
#include <array>
#include <map>
#include <queue>
#include <limits.h>
#include <set>
#include <stack>
#include <random>
#define rep(i,s,n) for(int i = (s); (n) > i; i++)
#define REP(i,n) rep(i,0,n)
#define RANGE(x,a,b) ((a) <= (x) && (x) <= (b))
#define POWT(x) ((x)*(x))
#define ALL(x) (x).begin(), (x).end()
#define MODI 10000
#define bitcheck(a,b)   ((a >> b) & 1)
#define bitset(a,b)      ( a |= (1 << b))
#define bitunset(a,b)    (a &= ~(1 << b))
using namespace std;
typedef pair<int, int> pii;
typedef long long ll;

signed main() {
	char str [100001];
	scanf("%s", str);
	int len = strlen(str);
	int ccou = 0,wcou;
	REP(i, len) {
		if (str[i] == 'c')
			ccou++;
		else
			break;
	}
	wcou = len - ccou;
	printf("%d\n", min(ccou-1, wcou));
	return 0;
}