#include <iostream>
#include <stdio.h>

using namespace std;

char keyboard[3][100] = {"QWERTYUIOP", "ASDFGHJKL", "ZXCVBNM"};
int posX[26], posY[26];

int abs(int x) {
    return x < 0 ? -x : x;
}

int manhattan(int x1, int y1, int x2, int y2) {
    return abs(x1 - x2) + abs(y1 - y2);
}

int main() {
    //freopen("in.txt", "r", stdin);

    char s[101];
    scanf("%s", s);

    for (int i = 0; i < 3; ++i) {
        int j = 0;
        char *p = keyboard[i];
        while (*p) {
            posX[*p - 'A'] = i;
            posY[*p - 'A'] = j;
            ++p;
            ++j;
        }
    }

    int leftX = 1, leftY = 3, rightX = 1, rightY = 6, ans = 0;
    char* p = s;
    while (*p) {
        int left = manhattan(leftX, leftY, posX[*p - 'A'], posY[*p - 'A']);
        int right = manhattan(rightX, rightY, posX[*p - 'A'], posY[*p - 'A']);

        if (left < right) {
            ans += left;
            leftX = posX[*p - 'A'];
            leftY = posY[*p - 'A'];
        } else {
            ans += right;
            rightX = posX[*p - 'A'];
            rightY = posY[*p - 'A'];
        }

        ++p;
    }

    cout << ans;

    return 0;
}