#include <bits/stdc++.h>
using namespace std;
int dist(int p1, int p2, int q1, int q2)
{
    return abs(p1 - q1) + abs(p2 - q2);
}
int lin[300], col[300];
int main ()
{
    long long int i, s = 0;
    char st, dr, c[200];
    cin >> c;
    st = 'F';
    dr = 'J';
    lin['Q'] = 0, col['Q'] = 0;
    lin['W'] = 0, col['W'] = 1;
    lin['E'] = 0, col['E'] = 2;
    lin['R'] = 0, col['R'] = 3;
    lin['T'] = 0, col['T'] = 4;
    lin['Y'] = 0, col['Y'] = 5;
    lin['U'] = 0, col['U'] = 6;
    lin['I'] = 0, col['I'] = 7;
    lin['O'] = 0, col['O'] = 8;
    lin['P'] = 0, col['P'] = 9;
    lin['A'] = 1, col['A'] = 0;
    lin['S'] = 1, col['S'] = 1;
    lin['D'] = 1, col['D'] = 2;
    lin['F'] = 1, col['F'] = 3;
    lin['G'] = 1, col['G'] = 4;
    lin['H'] = 1, col['H'] = 5;
    lin['J'] = 1, col['J'] = 6;
    lin['K'] = 1, col['K'] = 7;
    lin['L'] = 1, col['L'] = 8;
    lin['Z'] = 2, col['Z'] = 0;
    lin['X'] = 2, col['X'] = 1;
    lin['C'] = 2, col['C'] = 2;
    lin['V'] = 2, col['V'] = 3;
    lin['B'] = 2, col['B'] = 4;
    lin['N'] = 2, col['N'] = 5;
    lin['M'] = 2, col['M'] = 6;
    for(i = 0; i < strlen(c); i++)
    {
        if(dist(lin[st], col[st], lin[c[i]], col[c[i]]) < dist(lin[dr], col[dr], lin[c[i]], col[c[i]]))
        {
            int x = dist(lin[st], col[st], lin[c[i]], col[c[i]]);
            st =  c[i];
            s = s + x;
        }
        else
        {
            int x = dist(lin[dr], col[dr], lin[c[i]], col[c[i]]);
            dr = c[i];
            s = s + x;
        }
    }
    cout << s;
}