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

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

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

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

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