1: (0 5 15)

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

2: (6 15 19)

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

3: (5 17 12)

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

4: (11 16 13)

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