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