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

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

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

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

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