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

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

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

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

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