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

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

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

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

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