import std.algorithm,
       std.string,
       std.stdio;

void main() {
  string[] cwws = readln.chomp.split(string.init);
  string cww = "cww";
  size_t count;

  for (size_t idx; idx < cwws.length - 2; idx++) {
    for (size_t jdx = idx + 1; jdx < cwws.length - 1; jdx++) {
      for (size_t kdx = jdx + 1; kdx < cwws.length; kdx++) {
        if ([idx, jdx, kdx].map!(i => cwws[i]).join == cww) {
          count++;
        }
      }
    }
  }

  writeln(count);
}