(0 19 17 14 12 5 2)(1 7 4)(3 21 20)(6 10 8)(9 13 11)(15 18 16)
ALLOWS (11/8)-SEQUENCE
1: (1 7 9)

(0 19 17 14 12 5 2)(1 13 11 9 4)(3 21 20)(6 10 8)(7)(15 18 16)
2: (6 10 8)

(0 19 17 14 12 5 2)(1 13 11 9 4)(3 21 20)(6)(7)(8)(10)(15 18 16)
3: (4 11 9)

(0 19 17 14 12 5 2)(1 13 11)(3 21 20)(4)(6)(7)(8)(9)(10)(15 18 16)
4: (2 17 5)

(0 19 17)(1 13 11)(2)(3 21 20)(4)(5 14 12)(6)(7)(8)(9)(10)(15 18 16)