作者Johnny Chiang

1.

{A,B,C,F,G,J}
{F,H,I}
{H,G}
{C,D,E}


2.

{A,B,C,F,G,J}
{F,H,I}
{H,G}
{C,D,}
{D,E}

3.

{A,B,C,F,G,J}
{H,G}
{C,D,}
{D,E}

敬請賜教