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

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

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

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

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