bbb bbc bbe bbs bcb bcc bce bcs bcz be- beb bec bee bes bez bsb bsc bse bss bze bzs bzz c-- cbb cbc cbe cbs cbz ccb ccc cce ccs ccz ce- ceb cec cee ces cez csb csc cse css csz cz- czc cze ebb ebc ebe ebs ec- ecb ecc ece ecs eeb eec eee ees es- esb esc ese ess eze ezs ezz sbb sbc sbe sbs scb scc sce scs se- seb sec see ses sez ss- ssb ssc sse sss ssz sze zbb zbc zbs zce zcs zeb zec zee zes zez zse zsz zzs zzz