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

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

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

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

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