The check matrix of a [70,63,5]7(dual distance 39).
1000002411001334006320105342102100001620006151002354115623426454524411
0100001410023250014601061512051000026200011510063541126234254545264141
0010001400212100131020644310510000212000165100615411232342565452641441
0001001002111004320606411303140002100001621006154112353425624526454411
0000100021110055211054101052410021000016200061511123544256235264544141
0000010111100111100111010111110210000162000615101235412562342645451441
0000000000000000000000000000001111111111111111111111111111111111111110
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