Substitute
- s/PATTERN/REPLACEMENT/
- s{PATTERN}{REPLACEMENT}
$line = "abc123def";
$line =~ s/\d+/ /; # "abc def"
$line =~ s{
([a-z]*)
(\d*)
([a-z]*)
}
{$3$2$1}x; # "def123abc"
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$line = "abc123def";
$line =~ s/\d+/ /; # "abc def"
$line =~ s{
([a-z]*)
(\d*)
([a-z]*)
}
{$3$2$1}x; # "def123abc"