Fatal error: Uncaught ArgumentCountError: Too few arguments to function ab(), 1 passed in /in/HHcS4 on line 7 and exactly 2 expected in /in/HHcS4:2
Stack trace:
#0 /in/HHcS4(7): ab('a')
#1 {main}
thrown in /in/HHcS4 on line 2
Process exited with code 255.