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

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

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

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

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