1: (1 5 15)

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

2: (1 7 8)

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

3: (4 20 6)

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

4: (0 18 2)

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