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

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

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

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

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