1: (0 3 15)

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

2: (1 20 4)

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

3: (3 18 5)

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

4: (9 19 16)

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