#include <bits/stdc++.h>  
#define ll long long  
using namespace std; 

int main() {
    ll litter,ans;
    //freopen("P1765_1.in","r",stdin);
    string a;
    getline(cin,a);
    for (int i=0;i<a.length();i++){
        if(92==a[i]){
            i+=2;
            continue;
        }
        if ('z'==a[i]||'s'==a[i]){
            ans+=4;
            continue;
        }
        if (' '==a[i]){
            ans+=1;
            continue;
        }
        litter=a[i]-'a';
        if ('t'==a[i]||'u'==a[i]||'v'==a[i]){
            if('v'==a[i]){
            ans+=3;
            continue;
            }
            ans+=(litter)%3;
            continue;
        }
        if ((litter+1)%3==0){
           ans+=3;
           continue; 
        }
        ans+=(litter+1)%3;

    }
    cout<<ans<<endl;
    return 0;
}