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$t = [ @matrix ]
my @matrix=([qw(1 2 4 4)],[qw(5 2 0 8)],[qw(9 10 11 12)],); my $t = [ @matrix ];
my $t = [ [qw(1 2 4 4)],[qw(5 2 0 8)],[qw(9 10 11 12)], ];