1 first, 2 second 3 third 4 fourth 5 fifth 6 sixth 7 seventh 8 eighth 9 ninth 10 tenth
11 eleventh 12 twelfth 13 fourteenth 15 fifteenth 16 sixteenth 17 seventeenth 18 eighteenth 19 nineteenth 20twentieth
1 first, 2 second 3 third 4 fourth 5 fifth 6 sixth 7 seventh 8 eighth 9 ninth 10 tenth
11 eleventh 12 twelfth 13 fourteenth 15 fifteenth 16 sixteenth 17 seventeenth 18 eighteenth 19 nineteenth 20twentieth