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