// Program 84: Telephone Keypad Keystrokes

import java.util.*;
class KeypadStrokes {
    static final String[] keys = {
        "ABC", "DEF", "GHI", "JKL", "MNO", "PQRS", "TUV", "WXYZ"
    }
;
public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String word = sc.nextLine().trim().toUpperCase(Locale.ROOT);
    if (!word.matches("[A-Z]+")) {
        System.out.println("INVALID ENTRY");
        return;
    }
int total = 0;
for (char c : word.toCharArray()) {
    for (String key : keys) {
        int pos = key.indexOf(c);
        if (pos >= 0) {
            total += pos + 1;
            break;
        }
}
}
System.out.println("Number of keystrokes = " + total);
}
}