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

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

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

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

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