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  1. #!/bin/bash
  2. echo "hello 123 worLD" | grep -oP "\\b(?=[A-Za-z]*[a-z])(?=[A-Za-z]*[A-Z])[a-zA-Z]+"
Success #stdin #stdout 0s 5072KB
comments (?)
stdin 
Standard input is empty
stdout 
worLD
https://ideone.com/aGaXTA
language:
Bash (bash 5.0.3)
created:
7 years ago
visibility:
secret

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