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