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

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

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

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

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