#include <bits/stdc++.h>
using namespace std;
int t, n, m, k, l, r, op, x, y;
string str;
int ha[200], pa[10];
void solve() {
    for (int i = 'a', t = 0; i <= 'z'; i++) {
        if (i == 's' || i == 'z')t++;
        ha[i] = 1 + (i - 'a' - t) / 3;
        if (!pa[ha[i]])pa[ha[i]] = i;
    }
    while (cin >> str) {
        int siz = str.size();
        int ls = str[0];
        int cnt = ls-pa[ha[ls]]+1;
        for (int i = 1; i < siz; i++) {
            int ch = str[i];
            if (ha[ls] == ha[ch]) {
                cnt += 2;
            }
            cnt += ch-pa[ha[ch]]+1;
            ls = ch;
        }
        cout << cnt << "\n";
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    solve();
    return 0;
}