twenty-one

1 One 

2 two 

3 three 

4 four 

5 Five 

6 Six 

7 seven 

8 eight 

9 nine 

10 ten 

11 eleven 

12 Twelve 

13 thirteen 

14 fourteen 

15 fifteen 

16 sixteen 

17 seventeen 

18 eighteen 

19 nineteen 

20 twenty 

21 twenty-one 

22 twenty-two 

23 twenty-three 