single euro single european single european act single european currency single european market single european railway single european sky single european transport single event single events single ever single example single exception single executable single exit single expansion single experiment single exposure single expression single external single eye single face single facer single facility single fact single factor single failure single family single family home single family homes single family house single family residence single fan single farm single father single fathers single fault single feature single featuring single federal single fee single feed single female single females single fiber single fibre single field single fight single figure single figures single filament single file single film single filter single fin single final single financial single finger single fingerprint single fire single firm single first single fish single fixed single flame single flash single flat single flexible single flight single floor single flow single flower single fluid single focal single focus single folder single food single foot single for a while single for the album single for the rest single force single foreign single form single format single formula single fragment single frame single framework single free single french single frequency single friend single friends single from the album single from their debut single front single fruit single fuel