1: (0 3 10)

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

2: (2 19 4)

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

3: (1 20 12)

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

4: (3 13 7)

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