human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Engine, Horsepower, Torque, Carburetor, Compression Ratio, Bore & Stroke, VIN Code
###Question: What are the bore & stroke specifications for an engine with 4-barrel carburetor and VIN code of A?
gpt
SELECT Bore & Stroke FROM table WHERE Carburetor = 4-barrel AND VIN Code = a