N6FKWJFARVRKFKTNLCZFYFNPVHFJYBBAVSDRCVG3XLRUPNJORRRAC
Q4IRSNH2MHMR3QJIIPILEDIM4A2PLCG57T6KM7TACP4EVS6R4AZQC
7755FHS7ZTG4YGJNFYAONWSWSM636WOWFRISDKQU2AOJHN6ZVMBAC
mut conn := l.accept() or { panic('accept() failed') }
mut conn := l.accept() or { panic('accept() failed: $err') }