text: var fs = require('fs');
  
  var file = process.argv[2];
  
  var readfile = fs.readFileSync(file);
  
  var str = readfile.toString();
  var lines = (str.split('\n').length - 1);
  
  console.log(lines);
  
  // OFFICIAL SOLUTION
  // var fs = require('fs')
  // var contents = fs.readFileSync(process.argv[2])
  // var lines = contents.toString().split('\n').length - 1
  // console.log(lines)
  // note you can avoid the .toString() by passing 'utf8' as the
  // second argument to readFileSync, then you'll get a String!
  // fs.readFileSync(process.argv[2], 'utf8').split('\n').length - 1
  
  
  
  