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

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

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

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

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