ffff ffii ffrr fiff fifi fifm fifo fiii fimo fimr fior firm fmri fofo fomo foof foom for- fori form foro forr four frim frio from frou frum fuff fufu fuir fumi fumo fuor fur- furi furm furo furr ifim ifor ifrf ifri iiii iiio iioi iioo iium imfi imir immi immo imof imou imri imro imrr ioii ioio iomo ioof iooi iooo iori irfm irfu iri- irio irmo irri iuiu mfor mfou mfri miff mifi miii miio mim- mimi mimo mio- miri miro mirr miru miui mmff mmii mmmm mmor mmrf moff mofo mofu moif moii moio moir momi momo momu moor morf mori moro moru mouf mour muff mufi mufu muir mumm mumo mumu muri muro murr muru off- offo offr offu ofor oiii oium omim omio omo- omoi omoo omor omri omro omuo ooff oooo orff orfi orfu ori- orif orio ormo oro- orof orom oror orri orro orum ouff ouii ouir oumi our- ouro ouu- riff rifu riif rimi rimm rimo rimu riom riou riri rmif roff rofo roif roio roir roiu romi romm romo roof rooi room roor rori roro roru rouf roum rrif rrrr rrum ruff rufo ruif rumi rumm rumo ruri ruro ruru uirr umff ummo umor umri uofm uofo uomo uor- urff urfi urif urim uriu urmi uro- urom uroo urri urum urur uuri uuuu