b-u bbb bbc bbe bbu bcb bcc bce bcu bcz be- beb bec bee beu bez bub buc bue buu buz bze bzu bzz c-- cbb cbc cbe cbu cbz ccb ccc cce ccu ccz ce- ceb cec cee ceu cez cub cuc cue cuu cuz cz- czc cze ebb ebc ebe ebu ec- ecb ecc ece ecu eeb eec eee eu- eub euc eue eze ezz ubb ubc ube ubu ucb ucc uce ucu ueb uec uee uuc uue uuu uzb uzu zbb zbc zce zeb zec zee zez zub zuc zuz zzz