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

string s;
int rs;
string a[5] = {"QWERTYUIOP","ASDFGHJKL.","ZXCVBNM..."};
pair <int , int> co[300];
bool u = 0;
char c1, c2;

int main()
{
    for (int i = 0; i < 3; i++)
        for (int j = 0; j < a[i].size(); j++)
            co[a[i][j]] = {i, j};
    c1 = 'F', c2 = 'J';
    getline(cin, s);
    for (int i = 0; i < s.size(); i++)
    {
        u = 0;
        int minn = (abs(co[s[i]].x - co[c1].x) + abs(co[s[i]].y - co[c1].y));
        if (abs(co[s[i]].x - co[c2].x) + abs(co[s[i]].y - co[c2].y) < minn)
        {
            u = 1;
            minn = abs(co[s[i]].x - co[c2].x) + abs(co[s[i]].y - co[c2].y);
        }
        if (!u) c1 = s[i];
        else c2 = s[i];
        rs += minn;
    }
    cout << rs;
    return 0;
}