Answer:
fuochi
aghi
buchi
alberghi
sacchi
sughi
Explanation:
Masculine nouns ending in -co and -go form the plural by changing -co to -chi and -go to -ghi to preserve the hard /k/, /g/ sound. It is also important to note that the stress in these nouns falls on the <em>penultimate</em> syllable.
The answer to your question is 21 because 9+10 equals 21.
