bbbbbb bibiri bibiru bihpur biribi birpur bittur bribir bribri brubru brutii brutti bububu burbur buriti burrup bururi burutu buttir hibhib hipihi htruth hubbub hububb huh-uh hurth huthur huthut ihitit irrupt ittiri iturbi iturup phitti pihuri pipipi pipiri pippip pirrip pitpit pituri piupiu pppppp prithu pruitt prurit pupput puriri purpit purpur put-up puthir puthri puthur putput puttur rhipi- ribbit rippit rititi rub-up rubutu ruhubi rurutu thirpu thithi thrupp thurii tibbit tibiri tip-it tip-up tipiti tippit tiptur tirhut tirrit titbit titibu titipu titiri tittup tribit tribut tripup tritip truitt tuhuti tuipui tuiuti turbit turtur tururu tuttut ubuthi uh-huh up-put uruppu uthiru utrubi