1 The First
2 The Second
3 The Third
4 The Fourth
5 The Fifth
6 The Sixth
7 The Seventh
8 The Eighth
9 The Ninth
10 The Tenth
11 The Eleventh
12 The Twelfth
13 The Thirteenth
14 The Fourteenth
15 The Fifteenth...
Естественно, вписать в предложения строчными буквами.