#include <vector>
#include <set>
#include <string>
using namespace std;
#define int long long
const int mod=1e+7;
int a[26]={1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4};
signed main() {
    iostream::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    string str;
    getline(cin,str);
    int num=0;
    for(int i=0;i<str.size();i++){
        if(str[i]==' '){//注意空格
            num++;
        }else{
            num+=a[str[i]-'a'];
        }
    }
    cout <<num<< endl;
    return 0;//AC
 }