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

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

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

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

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