The check matrix of a [40,27,7]₃.

For more information see Extending and lengthening BCH-codes.

0000012022110001001222211111111111111111
0010001020200020110000111012111012200011
0012212100211212001002110022222012012010
0212202201211011000101002002112000000212
0120111202102221000010100202211002111120
0101220211012202100001100202000012202100
0122021101220211000000010102002010210022
0020102010201020100000001100100000200122
0201020102010201000000000011111001100010
0020002020100010100000000000011000001120
0122201202111021000000000000000111100121
0021211200121221000000000000000000011101
0111122002222110000000000000000000000011

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