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  1. #!/bin/bash
  2. grep -P '^\S+ \S+$'
Success #stdin #stdout 0.03s 5308KB
comments (?)
stdin 
this is a failure
this ok
stdout 
this ok
https://ideone.com/xrHi7p
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
public

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