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

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

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

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

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