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  1. echo abcdefghijklmnopqrstuvxz | sed '/^.\{3\}../s/./X/4'
  2. echo varun| awk 'BEGIN{OFS=FS=""}{$(2)="0";$(3)="1"}1'
Success #stdin #stdout 0.01s 5280KB
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abcXefghijklmnopqrstuvxz
v01un
https://ideone.com/Ul7ABF
language:
Bash (bash 5.0.3)
created:
2 days ago
visibility:
public

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