Помогите пожалуйста 8 упражнение

1-first
2-second
3-third
4-fourth
5-fifth
6-sixth
7-seventh
8-eighth
9-ninth
12-twelve
20-twentieth
21-twenty fierst
22-twenty second
23-twenty third
30-thirties
40-fortieth
50-fiftieth

First
second
third
fourth
fifth
eighth
ninth
twelfth
twentieth
twenty-first
twenty-second
twenty-third
thirtieth
fortieth
fiftieth