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

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

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

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

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