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

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

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

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

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