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  1. puts "123 456 789".gsub(/(\d)\d\b/, '\1')
Success #stdin #stdout 0.06s 9608KB
comments (?)
stdin 
Standard input is empty
stdout 
12 45 78
https://ideone.com/0811IV
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
secret

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