以f或fe结尾的单词knife、wife、life、leaf、thief、half、self、shelf、wolf、loaf、aloof、altorf、adf、asdf、bailiff、beef、behalf、behoof、belief、bluff、bookshelf。
以f结尾的单词brief、buff、caitiff、calf、calif、cardiff、chaff、chef、chief、cif、clef、cliff、cloverleaf、cuff、dandruff、deaf、debrief、disbelief、distaff。
