Got it? OK, here are the pieces: _ _ ________ _ _ ________ _| |_| | (_ (_ _| |_| | (_ (_ (_ _) _) _) _) _) _) _) _) (_ ( ( (_ (_ ( ( ( ) | 13 | ) ) | 20 | | 1 | _) _) | 16 | _) _) (_ (_ (_ (_ (_ (_ (_ (_ _) _) )_ _ ) _) _) )__ __) (_______( |_| |_| (__ __( |_| |_|
Source: https://ascii.co.uk/art/puzzle