#include <iostream>
#include <cstring>
#include <cmath>

using namespace std;

pair<int,int> v[] = { {1,1}, {2,5}, {2,3}, {1,3}, {0,3}, {1,4}, {1,5}, {1,6}, {0,8}, {1,7}, {1,8}, {1,9}, {2,7}, {2,6}, {0,9}, {0,10},{0,1},{0,4},{1,2},{0,5},{0,7},{2,5},{0,2},{2,2},{0,6},{2,1} } ;

int dp[110][40];
char str[110];

int Move(int from,int to)
{
    return abs(v[from].first - v[to].first ) + abs(v[from].second - v[to].second );
}

void Initialize()
{
    memset(dp,0x3f,sizeof(dp));

    str[0] = 'F';
    dp[0]['J'-'A'] = 0;
}

int main()
{
    Initialize();

    cin>>str+1;

    int n = strlen(str+1);
    int Min = 10000000;
    for(int i=1;i<=n;i++)
    {
        for(int j = 0;j<='Z'-'A'; j++)
        {
            dp[i][str[i-1]-'A'] = min(dp[i][str[i-1]-'A'],dp[i-1][j] + Move(j, str[i]-'A'));
            dp[i][j] = min(dp[i][j], dp[i-1][j] + Move(str[i-1] - 'A', str[i] - 'A'));
        }
    }


        for(int j = 0;j<='Z'-'A'; j++)
            Min = min(Min,dp[n][j]);

        cout<<Min<<'\n';



    return 0;
}