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

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

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

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

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