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

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

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

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

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