#include <iostream>
#include <vector>
using namespace std;
int main(int argc, const char * argv[])
{
    char c;
    int total = 0;
    vector<char> ab1;
    vector<char> ab2;
    vector<char> ab3;

    for (char a = 'a'; a <= 'z'; a+= 3) {
        ab1.push_back(a);
        ab2.push_back(a + 1);
        ab3.push_back(a + 2);
    }
    ab1.push_back('.');
    ab1.push_back('#');
    ab2.push_back(',');
    ab2.push_back(' ');
    ab3.push_back('!');



    while (cin.get(c)) {

        if (find(ab1.begin(), ab1.end(), c) != ab1.end())
            total += 1;

        if (find(ab2.begin(), ab2.end(), c) != ab2.end())
            total += 2;

        if (find(ab3.begin(), ab3.end(), c) != ab3.end())
            total += 3;

    }

    cout << total;
}