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

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

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

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

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