todays kata is the bank ocr
start getting some tests in place regarding the input format
make the 'test' pass
further document the format
account numbers failing test
passing test
ensure expected test passes
failing test
passing test
failing test case
refactor to function]
well, that's definitely the simplest way to pass that test
failing test
well, DTSTTCPW is one way...
failing test case
well, starting to get more complicated
quick refactor
failing test case
refactor constants
fix up the tests