#include <stdio.h>
#include <math.h>
#include <iostream>
#include <string>
using namespace std;
int main(){
    int n, l = 0;
    string s[10], t[10], r[10];
    scanf("%d", &n);
    s[0] = "Alice";
    s[1] = "Ariel";
    s[2] = "Aurora";
    s[3] = "Phil";
    s[4] = "Peter";
    s[5] = "Olaf";
    s[6] = "Phoebus";
    s[7] = "Ralph";
    s[8] = "Robin";

    t[0] = "Bambi";
    t[1] = "Belle";
    t[2] = "Bolt";
    t[3] = "Mulan";
    t[4] = "Mowgli";
    t[5] = "Mickey";
    t[6] = "Silver";
    t[7] = "Simba";
    t[8] = "Stitch";

    r[0] = "Dumbo";
    r[1] = "Genie";
    r[2] = "Jiminy";
    r[3] = "Kuzko";
    r[4] = "Kida";
    r[5] = "Kenai";
    r[6] = "Tarzan";
    r[7] = "Tiana";
    r[8] = "Winnie";
    string q[10010];
    for(int i = 0; i <= n; i ++){
        getline(cin, q[i]);
    }
    __int64 k[10010], len = 1, sum = 0;
    for(int i = 2; i <= n; i ++){
            int kk = 0;
        for(int j = 0; j < 9 ; j ++){
            if(q[i] == s[j]){
                kk = 1;
            }
            if(q[i] == t[j]){
                kk = 2;
            }
            if(q[i] == r[j]){
                kk = 3;
            }

        }
        k[len] = kk;
    len ++;
    }
k [0] = 1;
    for(int i = 1; i < len; i ++){


        sum += fabs(k[i] - k[i + 1]);

   }
      cout << sum << endl;
}