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

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

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

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

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