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

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

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

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

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