s
=input
('','s');m
=3-mod
(numel
(s
)-1,4);s
=reshape
([s zeros
(1,m
)]',4,[])';t
=char(mod
(floor(bsxfun
(@rdivide
,s
*256.
^[3:-1:0]',85.^[4:-1:0])),85)+33)';t
=t
(:)';['<~
' t(1:end-m) '~
>']
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