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

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

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

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

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