#include <bits/stdc++.h>
using namespace std;
int i,sol;
pair <int,int> L[1<<10];
int main()
{
    string s="QWERTYUIOP";
    for(i=0;i<s.size();++i) L[s[i]]=make_pair(0,i);
    s="ASDFGHJKL";
    for(i=0;i<s.size();++i) L[s[i]]=make_pair(1,i);
    s="ZXCVBNM";
    for(i=0;i<s.size();++i) L[s[i]]=make_pair(2,i);
    char x='F',y='J';
    cin>>s;
    for(i=0;i<s.size();++i)
    {
        if(abs(L[x].first-L[s[i]].first)+abs(L[x].second-L[s[i]].second)<abs(L[y].first-L[s[i]].first)+abs(L[y].second-L[s[i]].second))
        {
            sol+=abs(L[x].first-L[s[i]].first)+abs(L[x].second-L[s[i]].second);
            x=s[i];
        }
        else
        {
            sol+=abs(L[y].first-L[s[i]].first)+abs(L[y].second-L[s[i]].second);
            y=s[i];
        }
    }
    cout<<sol;
    return 0;
}