PROTHROMBIN

bi bo hi hm ho in it mi mo no oh oi om on op or pi ti to

bin bio bit boo bop bot bro brr him hin hip hit hob hon hop hot imp ion mho mib mir mob mon moo mop mor mot nib nim nip nit nob noh nom noo nor not nth obi ohm oho ono ooh oot opt orb ort phi pht pin pit poh poi pom poo pot pro rho rib rim rin rip rob rom rot tho tin tip tom ton too top tor

bint biro birr boho boom boon boor boot born bort both brim brin brio brit broo hint hobo homo hoop hoot horn inro into iron mint mono moon moor moot morn mort moth noir nori norm obit omit onto phon phot pint pion pirn pith pomo pooh poon poor porn port prim prom riot romp room root roti roto thin thio thir thro tiro tomb toom toon toph topi topo tori torn toro torr trim trio trip trop