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

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

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

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

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