1: (0 4 18)

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

2: (1 20 7)

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

3: (6 18 8)

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

4: (3 17 5)

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