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

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

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

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

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