+bool item::operator<(const item &right) const
+{
+ return myname < right.myname;
+}
+
+bool item::operator>(const item &right) const
+{
+ return myname > right.myname;
+}
+
+bool item::operator==(const item &right) const
+{
+ return myname == right.myname;
+}
+
+bool item::operator!=(const item &right) const
+{
+ return myname != right.myname;
+}
+