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

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

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

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

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