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

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

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

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

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