14 - 12, 13, _ , 15, 11 - 10, _ , 12, 13, , 17 - 15, 16, _ , 18, 15 - 14, _ , 16, 17, 19 - 17, 18, _, 20, 16 - _, 17, 18, 19, 18 - 20, 19, _ ,17, 13 - 14, _ ,12, 11, 12 - 15, 14, 13, _,

Missing number sequences 0-20

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恢復自動保存: ?