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

char str[112345];

int main() {

  scanf("%s", str);
  
  long dp[4] = {};
  dp[0] = 1;
  for(int i = 0; ; ++i) {
    if( str[i] == '\0' ) break;
    if( str[i] == 'w' ) {
      dp[3] += dp[2];
      dp[2] += dp[1];
    }
    if( str[i] == 'c' ) {
      dp[1] += dp[0];
    }
  }

  printf("%ld\n", dp[3]);
  
  return 0;
}