bbbb bbci bbdd bbin bcbc bccc bcci bcnu bcuc bdbc bddc bdii bdin bibb bibi bicc bici bidi bidu biin bin- binc bind bini binn binu bnib bnin bubb bubi bubu bucc buci bucu budb budd budi budu buic buid buin buiu bunb bund buni bunn bunu c-cd cbbc cbcc cbcn cbcu cbdb cbdc cbdi cbdn cbid cbnd ccbc ccbn cccb cccc ccci cccu ccdc ccdi ccdn ccic ccid ccii ccnb ccnc ccni ccnu ccuc cddb cdic cdii cdnb cdnc cibc cibi cicc cici cicu cidc cidi ciid ciii cin- cinc cind cini ciuc cnbc cnci cndd cnib cnic cnid cub- cubb cubi cucc cuci cucn cudi cui- cuin cund dbcc dcbc dccb dccc dcci dccu dcdb dcii dddd ddub dibb dici didi didu diii din- dinc dini dinn dinu dnic dub- dubb dubc dubu dudd dudu duid duin dunc dunn ibid icbc icbd iccb iccc icci iccn iccu icdc icdd icnb icnc icub idic idid idin idub idun iicd iiii iiuc inbd incb incd inci ind- indc indi indu inid inni innu inui inun iucc iuiu n-ii nbbc nbcc nbci nbic ncbc ncbi nccc ncci nccn nccu ncdc ncdn ncdu ncid ncnc ncnd ndcc nddb ndic nibi nicc nicd nici nicu nidd nidi niiu nind nini nndb nnnn nubc nubi nuci nucu nudc nudd nudi nuin nunc nunn ubbi ubic ubid ubii ubud ucbc ucci ucdc ucdd ucin udbc uddi udic udid udin udun unbd uncc unci undi uni- unic unii unin unni uuni uuuu