Your Italian professor:
1. UNO:
2. DUE:
3. TRE:
4. QUATTRO:
5. CINQUE:
6. SEI:
7. SETTE:
8. OTTO:
9. NOVE:
10. DIECI:
CORRECTION
The Italian word for "six" is spelled "SEI." A previous version of this post misspelled the word because the author was lost in Pietro's eyes.