CHALKBOARD

aa ab ad ah al ar ba bo do ha ho ka la lo od oh or

aah aal aba abo ado aha ala alb arb arc ark baa bad bah bal bar boa bod bra bro cab cad car cob cod col cor dab dah dak dal doc dol dor had hao hob hod kab koa kob kor lab lac lad lar lob oak oar oba oca oda oka old ora orb orc rad rah rho rob roc rod

alar alba arak arch arco baal bach back bald balk bard bark blah bloc boar bock bola bold bora bork brad calk calo carb card cark carl chad chao char clad clod coal coda cola cold cord cork crab dahl darb dark dhak dhal dock dork drab haar hack halo hard hark harl hoar hock hold holk hora kbar kohl kola kora lack lakh lard lark load loca loch lock lord odah okra orad oral orca rack road rock