import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.Arrays; public class QuestionA { public static void main(String[] args) { // TODO 自動生成されたメソッド・スタブ BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String line; try{ line = in.readLine(); }catch(IOException e){ System.out.println("0"); return; } int result = 0; int wcount = 0;//直前のcの位置 for(int i = line.length()-1; i >= 0; i--){ if(line.charAt(i) == 'c') result += wcount * (wcount - 1)/2; if(line.charAt(i) == 'w'){ wcount++; } } System.out.println(result); } }