Command to run application
For list of filenames
python3 indexer.py filename1 filename2 filename3 ...
For stdin
python3 indexer.py < filename1 filename2 filename3
python3 indexer.py < enter_text_here
python3 indexer.py
Command to test application
./testcase.sh
make sure testcase.sh is executable first
testcase include non-text file and application will check that