Hi Michael, Hope all is well :) I have a query about the case sensitivity validity of the states (that's a mouthful) We are going to be tested on the same format of .tsv file, however the contents may change (one of the previous answer you gave to someone's question). If the contents were to change, the handling of case sensitivity, would you have us change the input the user gave to something valid or would you rather have us just handling it by throwing an error? I am not sure whether I should go into specifics because it's about the assignment, but I was hoping you'd be able to point me in the right direction with this question :3 Hope your research is going well Thanks, Sahil