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

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

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

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

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