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  1. or download this
    $a1 = 0; $a2 = 1; $a3 = 4; 
$b1 = 8; $b2 = 2; $b3 = 9;
$c1 = 1; $c2 = 4; $c3 = 7;
  2. or download this
    for ($i=1; $i<=3; $i++) {
    print ${"a$i"}.${"c$i"}.${"c$i"};
}