four key components four key elements four key issues four key points four key principles four key questions four key steps four kinds of four layers of four leaf clover four letter word four letters of four levels of four life sentences four lines of four little girls four little words four living creatures four long years four main areas four main areas of four main categories four main characters four main components four main elements four main factors four main functions four main goals four main groups four main islands four main lines four main objectives four main parts four main pillars four main points four main principles four main reasons four main sections four main stages four main steps four main themes four main types four main types of four main ways four major areas four major categories four major challenges four major components four major objectives four major themes four major types four member states four men have four men in four men on four men who four men with four miles away four miles east four miles from four miles south four million dollars four million euros four million in four million people four million years four minutes late four minutes later four minutes left four minutes of four models of four modes of four months after four months ago four months from four months have four months i four months in four months in prison four months later four months now four months of four months of the year four months old four months on four months pregnant four months since four months without four more days four more hours four more months four more times four more weeks four more years four more years of four most common four most important four national parks four new species