#include <bits/stdc++.h>
#include <cstdio>
using namespace std;
/*
    abc def
ghi jkl mno
pqrs tuv wxyz
*/

int main() {
    map<char, int> time = {
        {'a', 1}, {'b', 2}, {'c', 3},
        {'d', 1}, {'e', 2}, {'f', 3},
        {'g', 1}, {'h', 2}, {'i', 3},
        {'j', 1}, {'k', 2}, {'l', 3},
        {'m', 1}, {'n', 2}, {'o', 3},
        {'p', 1}, {'q', 2}, {'r', 3}, {'s', 4},
        {'t', 1}, {'u', 2}, {'v', 3},
        {'w', 1}, {'x', 2}, {'y', 3}, {'z', 4},
    };
    map<char, int> keymap = {
        {'a', 2}, {'b', 2}, {'c', 2},
        {'d', 3}, {'e', 3}, {'f', 3},
        {'g', 4}, {'h', 4}, {'i', 4},
        {'j', 5}, {'k', 5}, {'l', 5},
        {'m', 6}, {'n', 6}, {'o', 6},
        {'p', 7}, {'q', 7}, {'r', 7}, {'s', 7},
        {'t', 8}, {'u', 8}, {'v', 8},
        {'w', 9}, {'x', 9}, {'y', 9}, {'z', 9},
    };
    char str[100];
    while(scanf("%s",str)!=EOF){
        int lastInput=1;
        int sum=0;
        for(int i=0;str[i]!='\0';i++){
            if(lastInput==keymap[str[i]]){sum+=2;}
            sum+=time[str[i]];
            lastInput=keymap[str[i]];
        }
   
    printf("%d\n",sum); }
}
// 64 位输出请用 printf("%lld")