#include <iostream>
#include <string>
using namespace std;

int main() {
    string s;
    cin >> s;

    int tong = 0;

    for (int i = 0; i < s.length(); i++) {
        if (s[i] == 'A' || s[i] == 'B' || s[i] == 'C')
            tong += 3;
        else if (s[i] == 'D' || s[i] == 'E' || s[i] == 'F')
            tong += 4;
        else if (s[i] == 'G' || s[i] == 'H' || s[i] == 'I')
            tong += 5;
        else if (s[i] == 'J' || s[i] == 'K' || s[i] == 'L')
            tong += 6;
        else if (s[i] == 'M' || s[i] == 'N' || s[i] == 'O')
            tong += 7;
        else if (s[i] == 'P' || s[i] == 'Q' || s[i] == 'R' || s[i] == 'S')
            tong += 8;
        else if (s[i] == 'T' || s[i] == 'U' || s[i] == 'V')
            tong += 9;
        else
            tong += 10; // W, X, Y, Z
    }

    cout << tong;

    return 0;
}