import java.util.Scanner;

public class Method {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String password = scanner.nextLine();
        boolean isValid = false;

        boolean firstRule = passwordLength(password, isValid);
        boolean secondRule = passwordConsistency(password, isValid);
        boolean thirdRule = passwordDigits(password, isValid);

        if (firstRule && secondRule && thirdRule) {
            System.out.println("Password is valid");
        }
    }

    private static boolean passwordLength(String password, boolean isValid) {

        if (password.length() >= 6 && password.length() <= 10) {
            isValid = true;
        } else {
            System.out.println("Password must be between 6 and 10 characters");
        }

        return isValid;
    }

    private static boolean passwordConsistency(String password, boolean isValid) {
        for (int i = 0; i < password.length(); i++) {
            if (Character.isLetter(password.charAt(i)) || Character.isDigit(password.charAt(i))) {
                isValid = true;
            } else {
                System.out.println("Password must consist only of letters and digits");
                break;
            }
        }

        return isValid;
    }

    private static boolean passwordDigits(String password, boolean isValid) {
        int digitsCounter = 0;

        for (int i = 0; i < password.length(); i++) {
            if (Character.isDigit(password.charAt(i))) {
                digitsCounter++;
            }
        }

        if (digitsCounter >= 2) {
            isValid = true;
        } else {
            System.out.println("Password must have at least 2 digits");
        }

        return isValid;
    }
}