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

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

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

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

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