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one hello
two world
three goodbye
two apple
one banana

one: hello, banana
two: world, apple
three: goodbye

push @{$hash_name{$key}}, $string;

$hash_name{$key}

push @{$hash_name{$key}}, $string;

one hello
two world
three goodbye
two apple
one banana

use strict;
use warnings;
...
three: goodbye
one: hello, banana
two: world, apple