#include <iostream>
#include <cstring>
#include <map>
using namespace std;

struct punct {int x, y;};

map <char, punct> v;
void initializare() {
    v['Q'].x = 1; v['Q'].y = 1;
    v['W'].x = 2; v['W'].y = 1;
    v['E'].x = 3; v['E'].y = 1;
    v['R'].x = 4; v['R'].y = 1;
    v['T'].x = 5; v['T'].y = 1;
    v['Y'].x = 6; v['Y'].y = 1;
    v['U'].x = 7; v['U'].y = 1;
    v['I'].x = 8; v['I'].y = 1;
    v['O'].x = 9; v['O'].y = 1;
    v['P'].x = 10;v['P'].y = 1;
    v['A'].x = 1; v['A'].y = 2;
    v['S'].x = 2; v['S'].y = 2;
    v['D'].x = 3; v['D'].y = 2;
    v['F'].x = 4; v['F'].y = 2;
    v['G'].x = 5; v['G'].y = 2;
    v['H'].x = 6; v['H'].y = 2;
    v['J'].x = 7; v['J'].y = 2;
    v['K'].x = 8; v['K'].y = 2;
    v['L'].x = 9; v['L'].y = 2;
    v['Z'].x = 1; v['Z'].y = 3;
    v['X'].x = 2; v['X'].y = 3;
    v['C'].x = 3; v['C'].y = 3;
    v['V'].x = 4; v['V'].y = 3;
    v['B'].x = 5; v['B'].y = 3;
    v['N'].x = 6; v['N'].y = 3;
    v['M'].x = 7; v['M'].y = 3;
}

char c[105]; int cost[105];

int dist (int ax, int ay, int bx, int by) {
    if (ax < bx) swap(ax, bx);
    if (ay < by) swap(ay, by);
    return ax - bx + ay - by;
}
int sum;
int main()
{
      initializare();
       char tmp1 = 'F', tmp2 = 'J';
       char k;
       int i;
       int i1 = 0, i2 = 0;
       int x1 = v['F'].x, x2 = v['J'].x , y1 = v['F'].y , y2 = v['J'].y, xt, yt;
       cin.getline(c, 102);
       int dist1, dist2;
       int length = strlen(c);
       for (i = 0; i < length; ++i) {
           k = c[i];
       x1 = v[tmp1].x;
       y1 = v[tmp1].y;
       x2 = v[tmp2].x;
       y2 = v[tmp2].y;
       xt = v[k].x;
       yt = v[k].y;
       dist1 = dist(x1, y1, xt, yt);
       dist2 = dist(x2, y2, xt, yt);
       if (cost[i] + dist1  < cost[i] + dist2) {
           cost[i + 1] = cost[i] + dist1;
           tmp1 = k;
           i1 = i + 1;
       }
       else {
           cost[i + 1] = cost[i] + dist2;
           tmp2 = k;
           i2 = i + 1;
       }
       }
       cout << cost[length];
       return 0;

}