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

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

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

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

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