1: (0 4 15)

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

2: (3 19 6)

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

3: (4 17 7)

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

4: (14 18 16)

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