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

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

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

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

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