BEGIN {
    function_word["a"] = 1
    function_word["aboard"] = 1
    function_word["about"] = 1
    function_word["above"] = 1
    function_word["accordance"] = 1
    function_word["according"] = 1
    function_word["account"] = 1
    function_word["across"] = 1
    function_word["addition"] = 1
    function_word["after"] = 1
    function_word["against"] = 1
    function_word["ago"] = 1
    function_word["ahead"] = 1
    function_word["ain't"] = 1
    function_word["all"] = 1
    function_word["along"] = 1
    function_word["alongside"] = 1
    function_word["although"] = 1
    function_word["am"] = 1
    function_word["amid"] = 1
    function_word["amidst"] = 1
    function_word["amn't"] = 1
    function_word["among"] = 1
    function_word["amongst"] = 1
    function_word["an"] = 1
    function_word["and"] = 1
    function_word["anent"] = 1
    function_word["another"] = 1
    function_word["anti"] = 1
    function_word["any"] = 1
    function_word["anybody"] = 1
    function_word["anyone"] = 1
    function_word["anything"] = 1
    function_word["apart"] = 1
    function_word["are"] = 1
    function_word["aren't"] = 1
    function_word["around"] = 1
    function_word["as"] = 1
    function_word["aside"] = 1
    function_word["astride"] = 1
    function_word["at"] = 1
    function_word["athwart"] = 1
    function_word["atop"] = 1
    function_word["away"] = 1
    function_word["barring"] = 1
    function_word["be"] = 1
    function_word["because"] = 1
    function_word["been"] = 1
    function_word["before"] = 1
    function_word["behalf"] = 1
    function_word["behind"] = 1
    function_word["behither"] = 1
    function_word["being"] = 1
    function_word["below"] = 1
    function_word["beneath"] = 1
    function_word["beside"] = 1
    function_word["besides"] = 1
    function_word["between"] = 1
    function_word["betwixt"] = 1
    function_word["beyond"] = 1
    function_word["both"] = 1
    function_word["but"] = 1
    function_word["by"] = 1
    function_word["can"] = 1
    function_word["can't"] = 1
    function_word["case"] = 1
    function_word["close"] = 1
    function_word["concerning"] = 1
    function_word["could"] = 1
    function_word["couldn't"] = 1
    function_word["cum"] = 1
    function_word["dare"] = 1
    function_word["daren't"] = 1
    function_word["despite"] = 1
    function_word["did"] = 1
    function_word["didn't"] = 1
    function_word["do"] = 1
    function_word["does"] = 1
    function_word["doesn't"] = 1
    function_word["don't"] = 1
    function_word["down"] = 1
    function_word["due"] = 1
    function_word["during"] = 1
    function_word["each"] = 1
    function_word["either"] = 1
    function_word["enough"] = 1
    function_word["ere"] = 1
    function_word["everybody"] = 1
    function_word["everyone"] = 1
    function_word["everything"] = 1
    function_word["except"] = 1
    function_word["excluding"] = 1
    function_word["failing"] = 1
    function_word["far"] = 1
    function_word["few"] = 1
    function_word["fewer"] = 1
    function_word["following"] = 1
    function_word["for"] = 1
    function_word["fornenst"] = 1
    function_word["fornent"] = 1
    function_word["from"] = 1
    function_word["front"] = 1
    function_word["given"] = 1
    function_word["had"] = 1
    function_word["hadn't"] = 1
    function_word["has"] = 1
    function_word["hasn't"] = 1
    function_word["have"] = 1
    function_word["haven't"] = 1
    function_word["he"] = 1
    function_word["hence"] = 1
    function_word["her"] = 1
    function_word["hers"] = 1
    function_word["herself"] = 1
    function_word["him"] = 1
    function_word["himself"] = 1
    function_word["his"] = 1
    function_word["how"] = 1
    function_word["i"] = 1
    function_word["if"] = 1
    function_word["in"] = 1
    function_word["including"] = 1
    function_word["inside"] = 1
    function_word["instead"] = 1
    function_word["into"] = 1
    function_word["is"] = 1
    function_word["isn't"] = 1
    function_word["it"] = 1
    function_word["its"] = 1
    function_word["itself"] = 1
    function_word["less"] = 1
    function_word["lest"] = 1
    function_word["lieu"] = 1
    function_word["like"] = 1
    function_word["little"] = 1
    function_word["many"] = 1
    function_word["may"] = 1
    function_word["mayn't"] = 1
    function_word["me"] = 1
    function_word["means"] = 1
    function_word["mid"] = 1
    function_word["might"] = 1
    function_word["mightn't"] = 1
    function_word["mine"] = 1
    function_word["minus"] = 1
    function_word["more"] = 1
    function_word["most"] = 1
    function_word["much"] = 1
    function_word["must"] = 1
    function_word["mustn't"] = 1
    function_word["my"] = 1
    function_word["myself"] = 1
    function_word["near"] = 1
    function_word["neither"] = 1
    function_word["next"] = 1
    function_word["nobody"] = 1
    function_word["none"] = 1
    function_word["noone"] = 1
    function_word["nor"] = 1
    function_word["nothing"] = 1
    function_word["notwithstanding"] = 1
    function_word["of"] = 1
    function_word["off"] = 1
    function_word["on"] = 1
    function_word["one"] = 1
    function_word["onto"] = 1
    function_word["opposite"] = 1
    function_word["or"] = 1
    function_word["order"] = 1
    function_word["others"] = 1
    function_word["our"] = 1
    function_word["ours"] = 1
    function_word["ourselves"] = 1
    function_word["out"] = 1
    function_word["outside"] = 1
    function_word["outwith"] = 1
    function_word["over"] = 1
    function_word["owing"] = 1
    function_word["pace"] = 1
    function_word["past"] = 1
    function_word["per"] = 1
    function_word["place"] = 1
    function_word["plenty"] = 1
    function_word["plus"] = 1
    function_word["point"] = 1
    function_word["prior"] = 1
    function_word["pro"] = 1
    function_word["pursuant"] = 1
    function_word["qua"] = 1
    function_word["re"] = 1
    function_word["regard"] = 1
    function_word["regarding"] = 1
    function_word["regardless"] = 1
    function_word["regards"] = 1
    function_word["respect"] = 1
    function_word["round"] = 1
    function_word["sans"] = 1
    function_word["save"] = 1
    function_word["several"] = 1
    function_word["shall"] = 1
    function_word["shan't"] = 1
    function_word["she"] = 1
    function_word["should"] = 1
    function_word["shouldn't"] = 1
    function_word["since"] = 1
    function_word["so"] = 1
    function_word["some"] = 1
    function_word["somebody"] = 1
    function_word["someone"] = 1
    function_word["something"] = 1
    function_word["soon"] = 1
    function_word["spite"] = 1
    function_word["subsequent"] = 1
    function_word["such"] = 1
    function_word["than"] = 1
    function_word["thanks"] = 1
    function_word["that"] = 1
    function_word["the"] = 1
    function_word["their"] = 1
    function_word["theirs"] = 1
    function_word["them"] = 1
    function_word["themselves"] = 1
    function_word["these"] = 1
    function_word["they"] = 1
    function_word["this"] = 1
    function_word["those"] = 1
    function_word["though"] = 1
    function_word["through"] = 1
    function_word["throughout"] = 1
    function_word["till"] = 1
    function_word["times"] = 1
    function_word["to"] = 1
    function_word["top"] = 1
    function_word["toward"] = 1
    function_word["towards"] = 1
    function_word["under"] = 1
    function_word["underneath"] = 1
    function_word["unless"] = 1
    function_word["unlike"] = 1
    function_word["until"] = 1
    function_word["unto"] = 1
    function_word["up"] = 1
    function_word["upon"] = 1
    function_word["us"] = 1
    function_word["versus"] = 1
    function_word["via"] = 1
    function_word["vis-à-vis"] = 1
    function_word["we"] = 1
    function_word["well"] = 1
    function_word["what"] = 1
    function_word["when"] = 1
    function_word["whence"] = 1
    function_word["whenever"] = 1
    function_word["where"] = 1
    function_word["wherefore"] = 1
    function_word["wherever"] = 1
    function_word["whether"] = 1
    function_word["which"] = 1
    function_word["while"] = 1
    function_word["whilst"] = 1
    function_word["whither"] = 1
    function_word["who"] = 1
    function_word["whom"] = 1
    function_word["whose"] = 1
    function_word["why"] = 1
    function_word["will"] = 1
    function_word["with"] = 1
    function_word["withal"] = 1
    function_word["within"] = 1
    function_word["without"] = 1
    function_word["won't"] = 1
    function_word["worth"] = 1
    function_word["yes"] = 1
    function_word["yonder"] = 1
    function_word["you"] = 1
    function_word["your"] = 1
    function_word["yours"] = 1
    function_word["yourself"] = 1
    function_word["yourselves"] = 1
  # It's silly to have HAVE and DO but not BE.
    function_word["be"] = 1
    function_word["am"] = 1
    function_word["is"] = 1
    function_word["are"] = 1
    function_word["was"] = 1
    function_word["were"] = 1
    function_word["been"] = 1
    function_word["being"] = 1
}
/^[a-zA-Z]/ && $1 in function_word {
    print
}