ar: park, arch, bark, car, dart, farm, garbage, harm, jar, karma, lard, Mars, party, tarp, yard
ur: nurse, burp, curse, fur, hurt, purse, surf, turf
or: sport, bore, core, dorm, fort, horse, more, north, port, sort, tore, wore
ir: bird, chirp, dirt, first, girst, mirk, quirk, shirt, thirsty
er: persimon, alert, better, certificate, determine, fertile, Germany, herb, jerk, merchant, nervous, perk, serpent, term, verge, wherever
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