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

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

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

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

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