Brainfuck⁰ is an esolang invented by User:None1 and inspired by Brainfuck², it is very stupid. It is like BF with only the
+ instruction, but way worse because you can only increment zero times or once.
The only valid program -
Brainfuck increases the accumulator.
Increase the accumulator
a,x=input(),0 if a=='Brainfuck': x+=1