#include using namespace std; using ll = long long; #define rep(i,m,n) for(int i=m; i bool chmin(T& a, T b){ if(a > b){a = b; return true;} return false; } template bool chmax(T& a, T b){ if(a < b){a = b; return true;} return false; } template T gcd(T a, T b){ return a % b ? gcd(b, a % b) : b; } template T lcm(T a, T b){ return a / gcd(a, b) * b; } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); string s; cin >> s; int n = s.size(); s = '?' + s; vector cnt_w(n+1, 0); rep(i, 1, n+1){ cnt_w[i] = cnt_w[i-1] + int(s[i] == 'w'); } ll ans = 0LL; rep(i, 1, n+1){ if(s[i] == 'c'){ ll x = cnt_w.back() - cnt_w[i]; ans += x*(x - 1LL)/2LL; } } cout << ans << endl; return 0; }