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

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

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

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

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