Friday, August 6, 2021

CHALLENGE 4031.1 [UNSOLVED]

 (BOB TO EXPERTS AND FUNS)

.=:]+1([?9*$(;*9![}3/!?#}1:.*).5{$:5$-(-1.++&($.9{$:7*/[&!)9/-}-7*;+/(3/!)(.{?1/!%5--}7{-;[(@1![}9/!%[}9