a-a a-c aaa aac aad aae aaf aah ac- aca acc acd ace acf ach ad- ada adc add ade adf adh aea aec aed aee aef aeh af- afa afc afd afe aff afh aha ahc ahd ahe ahf ahh c-- caa cac cad cae caf cah cca ccc ccd cce ccf cch cda cdc cdd cde cdf cdh ce- cea cec ced cee cef ceh cfa cfc cfd cfe cff cfh ch- cha chc chd che chf chh daa dac dad dae daf dah dca dcc dcd dce dcf dda ddc ddd dde ddf ddh de- dea dec ded dee def deh dfa dfc dfd dfe dff dfh dh- dha dhc dhd dhe dhf dhh eaa eac ead eae eaf eah ec- eca ecc ecd ece ecf ech ed- eda edc edd ede edf edh eea eec eed eee eef ef- efa efc efd efe eff efh eha ehc ehd ehe ehf ehh faa fac fad fae faf fah fca fcc fcd fce fcf fda fdc fdd fde fdf fdh fea fec fed fee fef feh ffa ffc ffd ffe fff ffh fha fhc fhe fhf fhh haa hac had hae haf hah hca hcc hcd hce hcf hch hda hdc hdd hde hdf hdh he- hea hec hed hee hef heh hfa hfc hfd hfe hff hfh hha hhc hhd hhe hhf hhh