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for $k (($j+1)..$#{$blocks[$i]}) {
                if ($blocks[$i][$k][4] == 88888) {
...
                        $temp = $blocks[$i][$n];
                        $blocks[$i][$n] = $blocks[$i][($sortedist[$n][
+2])];
                        $blocks[$i][($sortedist[$n][2])] = $blocks[$i]
+[$n];

[0][0][0] =>1
[0][0][1] =>515.438792
...
[0][4][4] =>88888
[0][4][5] =>99999
[0][4][6] =>99999