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

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

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

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

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