public void Insert15in8from0to0()
 {
     Assert.AreEqual(9, InsertNum.Insert(8, 15, 0, 0));
 }
 public void Insert15in8from3to8()
 {
     Assert.AreEqual(120, InsertNum.Insert(8, 15, 3, 8));
 }
 public void Insert15in15from0to0()
 {
     Assert.AreEqual(15, InsertNum.Insert(15, 15, 0, 0));
 }