/**
 * @author Changersh
 */

import java.util.*;

public class Main {
    private static int[] num = {2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9}; // 字母对应的数字
    private static int[] time = {1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 1, 2, 3, 1, 2, 3, 4}; // 字母在一个数字上的位置
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String s = scanner.next();
            int res = 0;
            char[] ch = s.toCharArray();
            res += time[ch[0] - 'a'];
            for (int i = 1; i < ch.length; i++) {
                if (num[ch[i] - 'a'] == num[ch[i - 1] - 'a']) res += 2;
                res += time[ch[i] - 'a'];
            }
            System.out.println(res);
        }
    }
}