I am trying to list files in a nested zip as below.
It is not listing files in second level.

For example:

`abc.zip` contains `test1.zip`, `test2.zip`, `test3.zip`

`pqr.zip` contains `test4.zip`, `test5.zip`, `test6.zip`

```
for f in *.zip
do
  unzip -l ${f}
  for p in ${f}
  do 
    unzip -l ${p}
  done
done

```