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#!/bin/bash
 
targets="A B C
D E F
G    H I"
 
while read -r line
do
   cmd="sed 's/ *$line/###$line/g'"
   echo "$cmd"
done <<< $targets

Success #stdin #stdout 0s 19640KB

stdin

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Standard input is empty

stdout

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sed 's/ *A B C/###A B C/g'
sed 's/ *D E F/###D E F/g'
sed 's/ *G    H I/###G    H I/g'

https://ideone.com/PvQ9RE

bash > sed format

language:

Bash (bash 5.0.3)

created:

visibility:

public

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