#define _USE_MATH_DEFINES
#include <sstream> //string stream its useful!
#include<string>
#include<iostream>
#include<utility> //pair
#include <vector> // vector
#include <algorithm>    // swap,sort,binary_search
#include <functional>   // std::greater
#include <map> //map
#include<set> //set
#include<queue> //queue
#include<list> //list
#include<cmath>
#include<numeric>
#include<cassert>
#include <iomanip> //cout<<setprecision

typedef long long ll;
#define ARRAY_LENGTH(array) (sizeof(array) / sizeof(array[0]))

using namespace std;
void omajinai() {
    
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout<<setprecision(15);
    //freopen("txt.csv","r",stdin);
}

int main(){
    omajinai();
    string s;
    cin>>s;
    int cl = 0,wl = 0;
    for(char c:s){
        if (c =='c') cl++; else break;
    }
    reverse(s.begin(),s.end());
    for (char c: s){
        if(c == 'w') wl++; else break;
    }
    cout<<min(cl-1,wl);
}