M16:=[
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    [ <1, -14>, <2, 35>, <4, -14>, <8, -5>, <16, 10> ],
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    [ <1, -20>, <2, 50>, <4, -20>, <8, -2>, <16, 4> ],
    [ <1, -16>, <2, 40>, <4, -16>, <8, -4>, <16, 8> ]
];

