Minifuck

Minifuck is a very minimalistic version of Brainfuck, made by User:Wh1teWolf. It has only 3 instructions and uses an right-infinite tape of binary bits as storage. It should be turing-complete.

Commands

 * <: Same as Brainfuck
 * .: Move to next bit and invert it and output letter stored in first 8 bits, if none then input
 * [: Move to next bit and invert it, skip next instruction and invert next bit if zero

Cat
<[<.[<.