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

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

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

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

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