In fruit flies, long wings are dominant to short wings in the chart what are the phenotypes ofbthe offspring

You don't show the chart. But whatever the parents, you need to set up a Punnett Square to find the answer.

Examples of output:

L - long

l - short

LL x ll will result in all Ll (long)

Ll x Ll will result in 1 LL (long), 2 Ll (long) and 1 ll (short)

ll x ll will result in all ll (short)

lots of combinations you can do