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

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

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

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

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