1: (0 3 11)

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

2: (2 19 4)

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

3: (1 20 12)

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

4: (3 18 7)

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