How would I go about sending the user back to the previous question in the flowchart when they answer anything other than "y" or "n" in python?

No Clicks usually low voltage or poor connections Starter cranks? Yes Example logic flow chart for diagnosing failure to start and run Engine Yes fires? Yes No Starter spins? NO Solenoid stuck, not powered Missing teeth on flywheel. Yes Battery read over 12V? No Yes Cleaned terminals? Spark to Yes No Starts and plugs? stalls? Ignition timing, fuel problem, No Yes cranking too slow - battery, starter. Check Fuel to No No OBD, blink filter? code? Vapor lock, Read OBD or Yes fuel pump, blockage. Yes OBD II or check- for blink code access. Fuel Yes Stalls on Yes injected? key release to run? With car in park or neutral, use heavy jumper or screwdriver to bypass starter relay solenoid. Test starter. No Jump start or pop start car and check if battery is charging No Clean battery terminals and connectors, engine ground. Yes No Single point, check throttle body. Electronic multi- point, separate disgnostic Ignition "run" circuit or column key switch failure Ring out with meter. Spark from coil? Copyright 2008 by Try starter spray in No Clicks usually low voltage or poor connections Starter cranks? Yes Example logic flow chart for diagnosing failure to start and run Engine Yes fires? Yes No Starter spins? NO Solenoid stuck, not powered Missing teeth on flywheel. Yes Battery read over 12V? No Yes Cleaned terminals? Spark to Yes No Starts and plugs? stalls? Ignition timing, fuel problem, No Yes cranking too slow - battery, starter. Check Fuel to No No OBD, blink filter? code? Vapor lock, Read OBD or Yes fuel pump, blockage. Yes OBD II or check- for blink code access. Fuel Yes Stalls on Yes injected? key release to run? With car in park or neutral, use heavy jumper or screwdriver to bypass starter relay solenoid. Test starter. No Jump start or pop start car and check if battery is charging No Clean battery terminals and connectors, engine ground. Yes No Single point, check throttle body. Electronic multi- point, separate disgnostic Ignition "run" circuit or column key switch failure Ring out with meter. Spark from coil? Copyright 2008 by Try starter spray in