bbbb bbci bbin bcbc bccc bcci bcnu bcuc bibb bibi bicc bici biin bin- binc bini binn binu bnib bnin bubb bubi bubu bucc buci bucu buic buin buiu bunb buni bunn bunu cbbc cbcc cbcn cbcu ccbc ccbn cccb cccc ccci cccu ccic ccii ccnb ccnc ccni ccnu ccuc cibc cibi cicc cici cicu ciii cin- cinc cini ciuc cnbc cnci cnib cnic cub- cubb cubi cucc cuci cucn cui- cuin icbc iccb iccc icci iccn iccu icnb icnc icub iiii iiuc incb inci inni innu inui inun iucc iuiu n-ii nbbc nbcc nbci nbic ncbc ncbi nccc ncci nccn nccu ncnc nibi nicc nici nicu niiu nini nnnn nubc nubi nuci nucu nuin nunc nunn ubbi ubic ubii ucbc ucci ucin uncc unci uni- unic unii unin unni uuni uuuu