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

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

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

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

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