#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include<map>
#include <iomanip>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
#define LONGINF 1000000000000000000
int main(){
	string a;
	cin >> a;
	int cc = 0;
	vector<int> listing;
	for (int i = 0;i < a.length();++i) {
		if (a[i] == 'c') {
			cc++;
		}
		else if (a[i] == 'w') {
			if (cc >= 2) {
				listing.push_back(i);
			}
			cc = 0;
		}else{
			cc = 0;
		}
	}
	if (listing.size() == 0) {
		cout << "0" << endl;
		return 0;
	}
	int hoge = listing[0];
	int pow = a.length() + 1 - listing[listing.size() - 1];
	cout << min(hoge,pow) - 1 << endl;
	return 0;
}