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

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

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

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

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