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    while (@AoA) {
        my $var = shift @AoA;
        my $a = $var->[1];
        my $b = $var->[2];
    }
    
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    while (@AoA) {
        my $var = shift @AoA;
        my ($a, $b) = @{$var}[1,2];
    }
    
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    while (@AoA) {
        my @var = @{shift @AoA};
        my $a = $var[1];
        my $b = $var[2];
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    for my $i (0 .. $#AoA) {
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