c-- ccc ccd cce ccf cch cco cdc cdd cde cdf cdh cdo ce- cec ced cee cef ceh ceo cfc cfd cfe cff cfh cfo ch- chc chd che chf chh cho co- coc cod coe cof coh coo dcc dcd dce dcf dco ddc ddd dde ddf ddh ddo de- dec ded dee def deh deo dfc dfd dfe dff dfh dfo dh- dhc dhd dhe dhf dhh dho doc dod doe dof doh doo ec- ecc ecd ece ecf ech eco ed- edc edd ede edf edh edo eec eed eee eef eeo ef- efc efd efe eff efh efo ehc ehd ehe ehf ehh eho eo- eoc eod eoe eof eoh eoo fcc fcd fce fcf fco fdc fdd fde fdf fdh fdo fec fed fee fef feh feo ffc ffd ffe fff ffh ffo fhc fhe fhf fhh fho foc foe fof foh foo hcc hcd hce hcf hch hco hdc hdd hde hdf hdh hdo he- hec hed hee hef heh heo hfc hfd hfe hff hfh hfo hhc hhd hhe hhf hhh hho hoc hod hoe hof hoh hoo oc- occ ocd ocf och oco odc odd ode odf odh odo oec oed oee oef oeh oeo of- ofc ofd ofe off ofo ohc ohd ohe ohf ohh oho oo- ooc ood oof ooh ooo