one.
2.
3.
four.
five.
6.
7.
eight.
nine.
10.
eleven.
12.
13.
fourteen.
fifteen.
sixteen.
17.
eighteen.
nineteen.
twenty.
21.
22.
23.
24.
25
26.
27.
28.
29.
thirty.
31.
32.
33.
34.
35
36
37.
38.
39.
40.
A source