fork download 
  1. rx = /\A(RPX|RO|P)(.*)/m
  2. puts "PIXRT".scan(rx)
Success #stdin #stdout 0.02s 9656KB
comments (?)
stdin 
Standard input is empty
stdout 
P
IXRT
https://ideone.com/iXJTo8
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
secret

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