AUTOTROPHIC

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airt arch arco atop auto caph capo carp cart chai chao chap char chat chia chip chit chop ciao coat coho coir coop coot coup crap crit crop curt hair harp hart haut hoar hoop hoot hora hour huic hurt iota itch oath ohia opah orca otic otto ouch ouph pact pair part path phat phot phut pica pita pith poco pooh poor port pour pout prao prat prau proa ptui puri putt rapt rath rato rich riot root rota roti roto roup rout ruth tach taco tact tahr taro tarp tart taut that thio thir thou thro thru tiro toit toot toph topi topo tora torc tori toro tort tour tout trap trio trip trop trot uric