import java.io.BufferedReader;
import java.io.InputStreamReader;

public class prog {

  public void check(String string) {
    int sum = 19;
    char[] phone = string.toCharArray();
    for (int i = 3; i < phone.length; i++) {
      if (phone[i] == phone[i - 1]) {
        sum += 8;
      }
      else {
        sum += 9;
      }
    }

    System.out.println(sum);
  }


  public static void main(String[] args) {
    prog myMain = new prog();
    BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
    try {
      myMain.check(buffer.readLine());
    }
    catch (Exception e) {
      e.printStackTrace();
    }

  }
}