#include <bits/stdc++.h> 

using i64 = long long; 
using u64 = unsigned long long; 
using u32 = unsigned; 

using u128 = unsigned __int128; 
using i128 = __int128; 

void solve() {
	std::string s; std::cin >> s;
	int N = s.size();
	int max = -1;
	for(int i = 0; i < N; i ++) {
		if(s[i] == 'c') {
			int Z = 0;
			for(int j = i + 1; j < N; j ++) {
				if(s[j] == 'w') Z ++;
				if(Z == 2) {
					max = std::max(max, j - i + 1);
					break;	
				} 
			}
		}
	}

	std::cout << max;
} 

int main() { 
	std::ios::sync_with_stdio(false); 
	std::cin.tie(nullptr); 

	int T = 1; 
	//std::cin >> T; 

	while (T--) { 
		solve(); 
	} 
	return 0; 
}