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

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

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

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

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