#include <bits/stdc++.h>
using namespace std;
int dist(int l1, int c1, int l2, int c2)
{
    return abs(l1 - l2) + abs(c1 - c2);
}
int lin[300], col[300];
int main ()
{
    int i, s = 0;
    char st, dr, c[200];
    cin >> c;
    st = 'F';
    dr = 'J';
    lin['Q'] = 1, col['Q'] = 1;
    lin['W'] = 1, col['W'] = 2;
    lin['E'] = 1, col['E'] = 3;
    lin['R'] = 1, col['R'] = 4;
    lin['T'] = 1, col['T'] = 5;
    lin['Y'] = 1, col['Y'] = 6;
    lin['U'] = 1, col['U'] = 7;
    lin['I'] = 1, col['I'] = 8;
    lin['O'] = 1, col['O'] = 9;
    lin['P'] = 1, col['P'] = 10;
    lin['A'] = 2, col['A'] = 1;
    lin['S'] = 2, col['S'] = 2;
    lin['D'] = 2, col['D'] = 3;
    lin['F'] = 2, col['F'] = 4;
    lin['G'] = 2, col['G'] = 5;
    lin['H'] = 2, col['H'] = 6;
    lin['J'] = 2, col['J'] = 7;
    lin['K'] = 2, col['K'] = 8;
    lin['L'] = 2, col['L'] = 9;
    lin['Z'] = 3, col['Z'] = 1;
    lin['X'] = 3, col['X'] = 2;
    lin['C'] = 3, col['C'] = 3;
    lin['V'] = 3, col['V'] = 4;
    lin['B'] = 3, col['B'] = 5;
    lin['N'] = 3, col['N'] = 6;
    lin['M'] = 3, col['M'] = 7;
    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;
}