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

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

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

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

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