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

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

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

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

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