Find all files with the name ending in ".txt" in the current directory and its subdirectories up to 3 levels deep, then take the first randomly selected number between 1 and 100 from the list of files and list the file name.
find . -maxdepth 3 -iname '*.txt' | head -n $(shuf -i 1-100 -n 1) | xargs -I % ls %