bbb bbc bbe bbh bbl bcb bcc bce bch bcl be- beb bec bee beh bel bhb bhc bhe bhh bhl blb blc ble blh bll c-- cbb cbc cbe cbh cbl ccb ccc cce cch ccl ce- ceb cec cee ceh cel ch- chb chc che chh chl cl- clb clc cle clh cll ebb ebc ebe ebh ebl ec- ecb ecc ece ech ecl eeb eec eee eel ehb ehc ehe ehh ehl elb elc ele elh ell hbb hbc hbe hbh hbl hcb hcc hce hch hcl he- heb hec hee heh hel hhb hhc hhe hhh hhl hlb hlc hle hlh hll lbb lbc lbe lbh lbl lcb lcc lce lch lcl leb lec lee leh lel lhb lhc lhh llb llc lle lll