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

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

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

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

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