(0 20 2)(1 6 3)(4 14 12 10 7)(5 19 17 16 13)(8 11 9)(15 21 18)
ALLOWS (11/8)-SEQUENCE
1: (1 6 15)

(0 20 2)(1 21 18 15 3)(4 14 12 10 7)(5 19 17 16 13)(6)(8 11 9)
2: (5 19 13)

(0 20 2)(1 21 18 15 3)(4 14 12 10 7)(5)(6)(8 11 9)(13 17 16)(19)
3: (1 21 18)

(0 20 2)(1 15 3)(4 14 12 10 7)(5)(6)(8 11 9)(13 17 16)(18)(19)(21)
4: (4 14 12)

(0 20 2)(1 15 3)(4 10 7)(5)(6)(8 11 9)(12)(13 17 16)(14)(18)(19)(21)