5,______,7 - 6, 7,______,9 - 8, 11,12,______,14 - 13, 19,20,21,______,23 - 22, 30,______,32 - 31, 45,______,47 - 46, 34,______,36 - 35, 22,23,24,______,26 - 25, 15,16,17,______,19 - 18, 28,29,30,______,32 - 31,

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