#include <bits/stdc++.h>

using namespace std;

int main() {
    string ans = "DCBAD";
    int s = 0;
    string c;
    cin >> c;
    for (int i = 0; i < 5; i++)
        if (c[i] == ans[i]) s += 30;

    cout << s << endl;
    return 0;
}