public class icell implements java.io.Serializable
{
    int head;  // data
    icell tail;  // pointer to next cell.

    public icell(int h, icell t) { head=h;  tail =t; }

    public String toString()
    {
	String s = "";
	for (icell i=this; i!=null; i=i.tail)
	    s = s + i.head + " ";
	return s;
    }
}


// icell l = new cell(2,new cell(3,new cell(5,null)));