#include<bits/stdc++.h>

using namespace std;

const int MAXN = 100 + 10;

int x[400], y[400];
int d[MAXN][26][26];

void smin(int &a, int b){a = min(a, b);}

int get(int a, int b){
	return abs(x[a] - x[b]) + abs(y[a] - y[b]);
}

int main(){
	x['Q'] = 0, y['Q'] = 0;
	x['W'] = 0, y['W'] = 1;
	x['E'] = 0, y['E'] = 2;
	x['R'] = 0, y['R'] = 3;
	x['T'] = 0, y['T'] = 4;
	x['Y'] = 0, y['Y'] = 5;
	x['U'] = 0, y['U'] = 6;
	x['I'] = 0, y['I'] = 7;
	x['O'] = 0, y['O'] = 8;
	x['P'] = 0, y['P'] = 9;
	x['A'] = 1, y['A'] = 0;
	x['S'] = 1, y['S'] = 1;
	x['D'] = 1, y['D'] = 2;
	x['F'] = 1, y['F'] = 3;
	x['G'] = 1, y['G'] = 4;
	x['H'] = 1, y['H'] = 5;
	x['J'] = 1, y['J'] = 6;
	x['K'] = 1, y['K'] = 7;
	x['L'] = 1, y['L'] = 8;
	x['Z'] = 2, y['Z'] = 0;
	x['X'] = 2, y['X'] = 1;
	x['C'] = 2, y['C'] = 2;
	x['V'] = 2, y['V'] = 3;
	x['B'] = 2, y['B'] = 4;
	x['N'] = 2, y['N'] = 5;
	x['M'] = 2, y['M'] = 6;

	string s;	cin >> s;
	memset(d, 63, sizeof(d));
	d[0]['F'-'A']['J'-'A'] = 0;
	for (int cur = 0; cur < s.size(); cur++){
		char c = s[cur];
		for (int i = 0; i < 26; i++)
			for (int j = 0; j < 26; j++){
				smin(d[cur + 1][i][c - 'A'], d[cur][i][j] + get(j + 'A', c));
				smin(d[cur + 1][c - 'A'][j], d[cur][i][j] + get(i + 'A', c));
			}
	}
	int ans = 1e9;
	for (int i = 0; i < 26; i++)
		for (int j = 0; j < 26; j++)
			ans = min(ans, d[s.size()][i][j]);
	cout << ans << endl;
	return 0;
}