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

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

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

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

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