#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define sf scanf
#define pf printf
#define pi 2*acos(0.0)
int main()
{
    map<string,ll>mp;
    mp["Alice"]=1;
    mp["Ariel"]=1;
    mp["Aurora"]=1;
    mp["Phil"]=1;
    mp["Peter"]=1;
    mp["Olaf"]=1;
    mp["Phoebus"]=1;
    mp["Ralph"]=1;
    mp["Robin"]=1;
    mp["Bambi"]=2;
    mp["Belle"]=2;
    mp["Bolt"]=2;
    mp["Mulan"]=2;
    mp["Mowgli"]=2;
    mp["Mickey"]=2;
    mp["Silver"]=2;
    mp["Simba"]=2;
    mp["Stitch"]=2;
    mp["Dumbo"]=3;
    mp["Genie"]=3;
    mp["Jiminy"]=3;
    mp["Kuzko"]=3;
    mp["Kida"]=3;
    mp["Kenai"]=3;
    mp["Tarzan"]=3;
    mp["Tiana"]=3;
    mp["Winnie"]=3;
    ll n;
    string s[10001];
    cin>>n;
    for(int i=0;i<n;i++)
        cin>>s[i];
    ll ans=0;
    if(n==1)
        cout<<abs(mp["Alice"]-mp[s[0]])<<endl;
    else{
     for(int i=0;i<n-1;i++)
    {
        ans+=abs(mp[s[i+1]]-mp[s[i]]);
    }
    cout<<ans<<endl;
    }
    return 0;
}