(0 20 17 15 13)(1 11 4)(2 14 12 9 3)(5 21 7)(6 10 8)(16 19 18)
ALLOWS (11/8)-SEQUENCE
1: (0 5 13)

(0)(1 11 4)(2 14 12 9 3)(5 20 17 15 13 21 7)(6 10 8)(16 19 18)
2: (2 14 12)

(0)(1 11 4)(2 9 3)(5 20 17 15 13 21 7)(6 10 8)(12)(14)(16 19 18)
3: (1 11 4)

(0)(1)(2 9 3)(4)(5 20 17 15 13 21 7)(6 10 8)(11)(12)(14)(16 19 18)
4: (7 13 21)

(0)(1)(2 9 3)(4)(5 20 17 15 13)(6 10 8)(7)(11)(12)(14)(16 19 18)(21)