λ ~/Downloads/ wget http://www.fourmilab.ch/webtools/unum/download/unum.tar.gz
--2020-04-20 13:44:11--  http://www.fourmilab.ch/webtools/unum/download/unum.tar.gz
Resolving www.fourmilab.ch (www.fourmilab.ch)... 52.28.236.0, 2a05:d014:d43:3101:c6ee:ea42:3836:6cbf
Connecting to www.fourmilab.ch (www.fourmilab.ch)|52.28.236.0|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1416635 (1.4M) [application/x-gzip]
Saving to: ‘unum.tar.gz’

unum.tar.gz                 100%[========================================>]   1.35M   627KB/s    in 2.2s

2020-04-20 13:44:13 (627 KB/s) - ‘unum.tar.gz’ saved [1416635/1416635]

λ ~/Downloads/ tar -zxvf unum.tar.gz
unum.pl
λ ~/Downloads/ perl -CA unum.pl  ︵
   Octal  Decimal      Hex        HTML    Character   Unicode
 0177065    65077   0xFE35    ︵    "︵"         PRESENTATION FORM FOR VERTICAL LEFT PARENTHESIS
λ ~/Downloads/