1: (0 1 15)

(0)(1 20 15 21 4)(2 8 5 18 7)(3 19 17)(6 16 14 12 9)(10 13 11)

2: (4 15 21)

(0)(1 20 15)(2 8 5 18 7)(3 19 17)(4)(6 16 14 12 9)(10 13 11)(21)

3: (2 18 7)

(0)(1 20 15)(2)(3 19 17)(4)(5 18 8)(6 16 14 12 9)(7)(10 13 11)(21)

4: (6 16 14)

(0)(1 20 15)(2)(3 19 17)(4)(5 18 8)(6 12 9)(7)(10 13 11)(14)(16)(21)