#include <bits/stdc++.h>
#include <cstring>
using namespace std;
int main()
{
    char a[205];
    int d[30]={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},sum=0,idx;
    gets(a);
    for(int i=0;i<strlen(a);i++)
    {
        if(a[i]==' ')
        {
            sum++;
        }
        else
        {
            idx=a[i]-'a';
            sum+=d[idx];
        }
    }
    cout<<sum;
    return 0;
}