#include <bits/stdc++.h>   using namespace std;   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     string s;     cin >> s;     long long w = 0, o = 0;     for (long long i = 0; i < s.length() - 1; i++) {       if (s[i] ==  v  && s[i + 1] ==  v )         w++;       else {         if (s[i] ==  o ) o++;       }     }     if (s[s.length() - 1] ==  o ) o++;     long long x = 0, ans = 0;     for (long long i = 0; i < s.length() - 1; i++) {       if (s[i] ==  v  && s[i + 1] ==  v )         x++;       else {         if (s[i] ==  o ) {           ans += x * (w - x);         }       }     }     cout << ans;     return 0;   }   