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

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

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

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

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