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

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

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

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

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