We are a small group of 4 and will be arriving in Amsterdam from Kuala Lumpur on 8 April. We have 9 days altogtehr and would like to visit 3 european cities (except for Paris, we've been there). We also plan to visit kukenholf for the tulips. Would 3 days A,sterdam, 3 days brussels and 3 days berlin be good ? Or, is Amsterdam, Switzerland and Germany doable in the 9 days?