(? 2 + 2) 14 = 2 ? 2 +2 ? +1
(? 2 + 2) 15 = 3 ? 2
(? 2 + 2) 16 = 3 ? 2 +4 ?
(? 2 + 2) 17 = 3 ? 2 + ? +3
(? 2 + 2) 18 = 6 ? 2 +5 ? +5
(? 2 + 2) 19 = 4 ? 2 +6 ? + 5
(? 2 + 2) 20 = 2 ? 2 +2 ? +4
(? 2 + 2) 21 = 6 ? 2 +6
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