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

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

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

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

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