I would say that you can't. You will probably need to get additional information to help decide.
You might say that 201433 could only be divided into 2014-3-3, but perhaps the missing digit is a 1 or a 2 instead of a 0. Then the intended value could be 2014-03-13 or 2014-03-23. Or perhaps the 4 is the typo and it is really in ddmmyy format so that the intended value is really 1933-12-20.