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

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

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

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

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