Voice control door lock

Hi, can anyone tell me how I going to know what input digit did I enter? How to define it?
Below is my code. Thanks.

#include "VoiceRecognitionV4.h" //VOICE using HardwareSerial 
#include <Servo.h>

// Requires Arduino MEGA 2560
VR VR1(&Serial1);
VR VR2(&Serial3);

const byte MaxPasscodeLength = 16;
char PasscodeDigits[MaxPasscodeLength] = "12";
char EnteredDigits[MaxPasscodeLength];
char NewPasscode1[MaxPasscodeLength];
char NewPasscode2[MaxPasscodeLength];

byte EnteredDigitsIndex = 0;

const int CHANGE_PASSWORD_COMMAND = 10;
const int ENTER_COMMAND = 11;
const int CLEAR_COMMAND = 12;
int led = 13;
Servo lock;        

uint8_t VR1RecordEnables[7] =
{
  0, // Zero
  1, // One
  2, // Two
  3, // Three
  4, // Four
  5, // Five
  6, // Six
};

uint8_t VR2RecordEnables[6] =
{
  7, // Seven
  8, // Eight
  9, // Nine
  10, // Changepassword
  11, // Enter
  12, // Clear
};


enum States {EnteringPasscode, Unlocked, EnteringNew1, EnteringNew2} State = EnteringPasscode;

void setup()
{
  Serial.begin(115200);
  delay(200);
  
  /** initialize */
  Serial1.begin(9600);  // Arduino MEGA 2560 required
  Serial3.begin(9600);  // Arduino MEGA 2560 required

  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);
  lock.attach(A3);
  pinMode(A3,OUTPUT);
  lock.write(0);
  
  Serial.println("Locked. Say password digits followed by 'Enter' for access.");


  if (VR1.clear() == 0)
  {
    Serial.println("VR1 cleared.");
  }
  else
  {
    Serial.println("VR1 not found!");
    Serial.println("Please check connection and restart Arduino.");
    while (1);
  }

  if (VR2.clear() == 0)
  {
    Serial.println("VR2 cleared.");
  }
  else
  {
    Serial.println("VR2 not found!");
    Serial.println("Please check connection and restart Arduino.");
    while (1);
  }

  if (VR1.load(VR1RecordEnables, 7) >= 0)
  {
    Serial.println(F("VR1 loaded."));
  }
  else
  {
    Serial.println("VR1 load failed!");
    Serial.println("Please check connection and restart Arduino.");
    while (1);
  }

  if (VR2.load(VR2RecordEnables, 6) >= 0)
  {
    Serial.println(F("VR2 loaded."));
  }
  else
  {
    Serial.println("VR2 load failed!");
    Serial.println("Please check connection and restart Arduino.");
    while (1);
  }
}


void loop()
{
  int input;
  do
  {
    input = GetInput();

  }
  while (input < 0);

  switch (State)
  {
    case EnteringPasscode:
      if (input < 10 && EnteredDigitsIndex < MaxPasscodeLength - 1)
      {
        EnteredDigits[EnteredDigitsIndex++] = input + '0';  // Convert to character
        EnteredDigits[EnteredDigitsIndex] = '\0'; // Null terminator
      }

      if (input == CHANGE_PASSWORD_COMMAND)
      {
        Serial.println("Can't change password while locked.");
        Serial.println("Locked. Say password digits followed by 'Enter' for access.");
        // Start Over
        EnteredDigitsIndex = 0;
        EnteredDigits[0] = '\0';
      }

      if (input == ENTER_COMMAND)
      {
        // Does it match?
        if (strcmp(EnteredDigits, PasscodeDigits) == 0)
        {
          // Yes.  Unlock.
          digitalWrite(led, HIGH);
          openDoor();
          Serial.println("Unlocked. Say 'clear' to lock.");
          State = Unlocked;
        }
        else
        {
          // Not a match
          Serial.println("Wrong password.  Try again.");
          // Start Over
          EnteredDigitsIndex = 0;
          EnteredDigits[0] = '\0';
        }
      }

      if (input == CLEAR_COMMAND)
      {
        Serial.println("Input cleared. Say password digits followed by 'Enter' for access.");
        // Start Over
        EnteredDigitsIndex = 0;
        EnteredDigits[0] = '\0';
      }
      break;

    case Unlocked:
      if (input == CHANGE_PASSWORD_COMMAND)
      {
        Serial.println("Say digits for new password followed by 'Enter'.");
        // Start Over
        EnteredDigitsIndex = 0;
        NewPasscode1[0] = '\0';
        State = EnteringNew1;
      }
      else if (input == CLEAR_COMMAND)
      {
        Serial.println("Locking.  Say password digits followed by 'Enter' for access.");
        digitalWrite(led,LOW);
        closeDoor();
        // Start Over
        EnteredDigitsIndex = 0;
        EnteredDigits[0] = '\0';
        State = EnteringPasscode;
      }
      else
      {
        Serial.println("Invalid input while unlocked.  Say 'Clear' to lock.");
      }
      break;

    case EnteringNew1:
      if (input < 10 && EnteredDigitsIndex < MaxPasscodeLength - 1)
      {
        NewPasscode1[EnteredDigitsIndex++] = input + '0';  // Convert to character
        NewPasscode1[EnteredDigitsIndex] = '\0'; // Null terminator
      }

      if (input == ENTER_COMMAND)
      {
        if (EnteredDigitsIndex == 0)
        {
          // EMPTY PASSWORD
          Serial.println("New password cannot be empty.  Say digits for new password followed by 'Enter'.");
        }
        else
        {
          Serial.println("Repeat the new password followed by 'Enter'.");
          EnteredDigitsIndex = 0;
          NewPasscode2[0] = '\0';
          State = EnteringNew2;
        }
      }

      if (input == CLEAR_COMMAND)
      {
        Serial.println("Input cleared. Say digits for new password followed by 'Enter'.");
        Serial.println("Or say'Changepassword' to cancel change.");
        // Start Over
        EnteredDigitsIndex = 0;
        NewPasscode1[0] = '\0';
      }

      if (input == CHANGE_PASSWORD_COMMAND)
      {
        Serial.println("Password change canceled.");
        State = Unlocked;
      }
      break;

    case EnteringNew2:
      if (input < 10 && EnteredDigitsIndex < MaxPasscodeLength - 1)
      {
        NewPasscode2[EnteredDigitsIndex++] = input + '0';  // Convert to character
        NewPasscode2[EnteredDigitsIndex] = '\0'; // Null terminator
      }
      if (input == ENTER_COMMAND)
      {
        if (strcmp(NewPasscode1, NewPasscode2) == 0)
        {
          Serial.println("New password set.  Say 'Clear' to lock.");
          strcpy(PasscodeDigits, NewPasscode2);  // Replace previous password
        }
        else
        {
          Serial.println("Repeat did not match. Password change canceled. Say 'Clear' to lock.");
        }
        State = Unlocked;
      }

      if (input == CLEAR_COMMAND)
      {
        Serial.println("Input cleared. Repeat digits for new password followed by 'Enter'.");
        Serial.println("Or say'Changepassword' to cancel change.");
        // Start Over
        EnteredDigitsIndex = 0;
        NewPasscode2[0] = '\0';
      }

      if (input == CHANGE_PASSWORD_COMMAND)
      {
        Serial.println("Password change canceled.");
        State = Unlocked;
      }
      break;
  }
}

int GetInput()
{
  uint8_t buf[32];
  int ret;
  
  // Check for input from VR1
  ret = VR1.recognize(buf, 50);
  if (ret > 0)
    return buf[2];
 
  // No input from VR1.  Check for input from VR2
  ret = VR2.recognize(buf, 50);
  if (ret > 0)
    return buf[1];
  
  return -1; // No input this time
}

void openDoor()
{             
  
  Serial.println("Door open"); 
  lock.attach(A3);
  lock.write(90);
  delay(1000);
  lock.detach();
  delay(500);
  
 
}

void closeDoor()
{
  lock.attach(A3);
  delay(1000);
  lock.write(0);
  delay(1000);
  lock.detach();
  
}