+------------------+
|   Hello+World!   |
+==================+
| This is+my first |
|+-+ code|golf  +-+|
|+-+chall|enge! +-+|
+------------------+

┌──────────────────┐
│   Hello+World!   │
╞══════════════════╡
│ This is+my first │
│+-+ code|golf  +-+│
│+-+chall|enge! +-+│
└──────────────────┘

     +===+===+===+
     | 1 | 2 | 3 |
 +---+===+===+===+
 | 1 | 1 | 2 | 3 |
 +---+---+---+---+
 | 2 | 2 | 4 | 6 |
 +---+---+---+---+
 |-3 |-3 |-6 |-9 |
 +===+---+---+---+

     ╒═══╤═══╤═══╕
     │ 1 │ 2 │ 3 │
 ┌───╪═══╪═══╪═══╡
 │ 1 │ 1 │ 2 │ 3 │
 ├───┼───┼───┼───┤
 │ 2 │ 2 │ 4 │ 6 │
 ├───┼───┼───┼───┤
 │-3 │-3 │-6 │-9 │
 ╘═══╧───┴───┴───┘

      +-----+

    <Undefined>

      +-----+
      +-----+

      ┌─────┐
      └─────┘

+-----------------+
|  Hello, World!  |
| This is invalid |
|      input      |
 -----------------+

    <Undefined>

       ++++
       ++++
       ++++

       ┌┬┬┐
       ├┼┼┤
       └┴┴┘

       +--+
       ++++
       +--+

    <Undefined>