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

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

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

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

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