#include <Keyboard.h>

void toggleKey(int key){
  Keyboard.press(KEY_LEFT_ALT);
  Keyboard.press(KEY_LEFT_SHIFT);
  delay(100);
  Serial.println(key);
  switch(key){
   case 0:
    Keyboard.press('A');
   break;
   case 1:
    Keyboard.press('S');
   break;
   case 2:
    Keyboard.press('D');
   break;
   case 3:
    Keyboard.press('F');
   break;
   case 4:
    Keyboard.press('G');
   break;
   case 5:
    Keyboard.press('H');
   break;
   case 6:
    Keyboard.press('J');
   break;
   case 7:
    Keyboard.press('K');
   break;
   case 8:
    Keyboard.press('L');
   break;
   case 9:
    Keyboard.press('M');
   break;
   case 11:
    Keyboard.press('N');
   break;
   case 12:
    Keyboard.press('B');
   break;
  }
  delay(500);
  Keyboard.releaseAll();
}

bool enabled = false;

void setup() {
  Keyboard.begin();
  for(int i=0;i<10;i++) pinMode(i,INPUT_PULLUP);
  pinMode(11,INPUT_PULLUP); // Correct answer
  pinMode(12,INPUT_PULLUP); // Wrong answer
}

void loop() {
  for(int i=0;i<10;i++){
    if(!digitalRead(i)){
      if(!enabled){
        toggleKey(i);
        enabled = true;
      }
    }
  }
  if(!digitalRead(11)){
    toggleKey(11);
    enabled = false;
  }
  if(!digitalRead(12)){
    toggleKey(12);
    enabled = false;
  }
}