I cant get the code to print what is defined in the html variable.

var questions = [
  ['How old are you?', 25],
  ['How many continents are there?', 7],
  ['What s the number 11?', 12]
];

var correctAnswers = 0;
var question;
var answer;
var response;
var html;

var correct = [];
var wrong = [];

function print(message) {
  var outputDiv = document.getElementById('output');
  outputDiv.innerHTML = message;
}

function bList(arr){
  var listHTML = '<ol>';
  for(var i = 0; i < arr.lenght; i += 1){
    listHTML += '<li>'+ arr[i]+'</li>';
  }
      listHTML += '</ol>';
      return listHTML;
}

for (var i = 0; i < questions.length; i+=1){
  question = questions[i][0];
  answer = questions[i][1];
  response = parseInt(prompt(question));
  if(response === answer){
    correct.push(question);
  correctAnswers+=1;
} else {
  wrong.push(question);
}}

html += 'You got ' + correctAnswers + ' questions right!';
html += '<h2>Questions you got right:</h2>';
html += bList(correct);
html += '<h2>Questions you got wrong:</h2>';
html += bList(wrong);
print(html);