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  1. awk '{gsub(/[[:upper:]]/,"_&");sub(/_/,"");print tolower($0)}'  <<< "RazDwaTrzy.txt"
Success #stdin #stdout 0.03s 5264KB
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Standard input is empty
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raz_dwa_trzy.txt
https://ideone.com/kpLv37
language:
Bash (bash 5.0.3)
created:
11 years ago
visibility:
public

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