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

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

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

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

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