TASK DEFINITION: Read the given query and classify it as a 'Good' or 'Bad' query depending on how well the query is formed, 'Bad' being the expected output for a not so well formed query and 'Good' being the expected output for a well formed query. A query may be wrong based on common sense or general facts, but if it is well formed, you should answer with Good.
PROBLEM: Hydrology is a study of what ?

SOLUTION: Bad

PROBLEM: What is the scientific name for an Austalian gum tree ?

SOLUTION: Good

PROBLEM: How many letters in the english alphibet ?

SOLUTION:
Bad