title: Language made only of brackets, plus and exclamation marks
body: <p>A colleague of mine sent me a snippet of code made only of brackets ()[]{}, plus signs and exclamation marks.</p>
  
  <pre><code>[][(![]+[])[!+[]+!![]+!![]]+([]+{})[+!![]]+(!![]+[])[+!![]]+(!![]+[])[+[]]] 
  </code></pre>
  
  <p>and it goes on like this..</p>
  
  <p>This vaguely reminds me of <a href="http://en.wikipedia.org/wiki/Brainfuck" rel="noreferrer">Brainfuck</a>, but I couldn't find any esoteric language written like this.</p>
  
  <p>Could you help me understand what language is it?</p>