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