recr recu redc redd rede redh redo redr redu reed reef reek refd refe reff refr refu rehe reke reko reod reof reou rerd rere rero reru reue reuf reuk reuu rfef rffc rhce rhee rheo rhoc rhod rhoh rhue rkkf rocc roce roch rock roco rodd rode rodo roed roer rofc rofe roff rofo rohe rohr rohu roke rokh rokk roko rokr roku rood roof rook roor rorc rore rork roro roru roud roue rouf rouh rouk rred rrfc rrrr ruce ruch ruck rudd rude rudo rued ruer rufc rufe ruff rufo ruhe ruhh ruhr ruke rukh rukk ruku ruok rurc rurd rure ruro ruru ruud ucdc ucdd uche ucho ucrc uder udoh udoo uduk ufcu ufer uffe ufuk uh-d uhde uher uhoh uhok uhuh ukcc ukek ukeu ukko ukok ukrc ukur uocc uofo uoke uor- uore urch urde urdu ure- ured ureh urfe urff urho urke uro- urok uroo urre urrh uruk urur uuoc uuuu