b-u bbb bbc bbe bbl bbu bcb bcc bce bcl bcu bcz be- beb bec bee bel beu bez blb blc ble bll blu blz bub buc bue bul buu buz bze bzu bzz c-- cbb cbc cbe cbl cbu cbz ccb ccc cce ccl ccu ccz ce- ceb cec cee cel ceu cez cl- clb clc cle cll clu clz cub cuc cue cul cuu cuz cz- czc cze ebb ebc ebe ebl ebu ec- ecb ecc ece ecl ecu eeb eec eee eel elb elc ele ell elu elz eu- eub euc eue eul eze ezz lbb lbc lbe lbl lbu lcb lcc lce lcl lcu leb lec lee lel leu lez llb llc lle lll llu llz lub luc lue lul luu luz lzu ubb ubc ube ubl ubu ucb ucc uce ucl ucu ueb uec uee uel ulb ulc ule ull ulu uuc uue uuu uzb uzu zbb zbc zbl zce zcl zeb zec zee zel zez zub zuc zul zuz zzz