#include <cstring>
#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <queue>
#include <algorithm>

long dp[112345][4];

int main() {

  std::string str;
  std::cin >> str;

  dp[0][0] = 1;
  for(int i = 0; i < (int)str.size(); ++i) {
    for(int j = 0; j < 4; ++j) {
      dp[i + 1][j] = dp[i][j];
    }
    if( str[i] == 'c' ) {
      dp[i + 1][1] += dp[i][0];
    }
    if( str[i] == 'w' ) {
      dp[i + 1][2] += dp[i][1];
      dp[i + 1][3] += dp[i][2];
    }
  }

  std::cout << dp[str.size()][3] << std::endl;
  
  return 0;
}