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