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@a1 = qw(0 1 2 3 4); @a2 = qw(0 1 2 3 4 5 6 7 8); @a3 = qw(0 1); @a4 = qw(0 1 2 3 4 5);
$str = $a1[$i] . " " . $a2[$j] . " ". $a3[$k]. " " . $a4[$l]