I = 1st = first II = 2nd = second III = 3rd = third IV = 4th = fourth V = 5th = fifth VI = 6th =sixth VII = 7th = seventh VIII = 8th = eighth IX = 9th = ninth X = 10th = tenth XI = 11th = eleventh XII = 12th = twelfth XIII = 13th = thirteenth XIV = 14th = fourteenth XV = 15th = fifteenth XVI = 16th = s