# [Turing Machine Code], <s>19</s> 29 bytes

 0 0 0 * 2
 * 1 1 r 1
 1 _ 1 r 1

[Try it online!][TIO-k5o303hh]

[Turing Machine Code]: http://morphett.info/turing/turing.html
[TIO-k5o303hh]: http://morphett.info/turing/turing.html?c412aad0de1f555c6340f9bfa29dac70