-ic a-a a-b a-c a-i aaa aab aac aad aae aai aak aam ab- aba abb abc abd abe abi abk abm ac- aca acb acc acd ace aci ack acm ad- ada adb adc add ade adi adk adm aea aeb aec aed aee aei aek aem ai- aia aib aic aid aie aii aik aim aka akb akc akd ake aki akk akm ama amb amc amd ame ami amk amm baa bab bac bad bae bai bak bam bba bbb bbc bbd bbe bbi bbk bbm bca bcb bcc bcd bce bci bck bcm bda bdb bdc bdd bde bdi bdk bdm be- bea beb bec bed bee bei bek bem bi- bia bib bic bid bie bii bik bim bka bkb bkc bke bkk bkm bma bmb bmc bmd bme bmi bmk bmm c-- caa cab cac cad cae cai cak cam cba cbb cbc cbd cbe cbi cbk cbm cca ccb ccc ccd cce cci cck ccm cda cdb cdc cdd cde cdi cdk cdm ce- cea ceb cec ced cee cei cek cem ci- cia cib cic cid cie cii cik cim cka ckb ckc ckd cki ckm cma cmb cmc cmd cme cmi cmk cmm daa dab dac dad dae dai dak dam dba dbb dbc dbd dbe dbi dbk dbm dca dcb dcc dcd dce dci dck dcm dda ddb ddc ddd dde ddi ddk ddm de- dea deb dec ded dee dei dek dem di- dia dib dic did die dii dik dim dka dkb dkc dke dki dkk dkm dma dmb dmc dmd dme dmi dmk dmm eaa eab eac ead eae eai eak eam eba ebb ebc ebd ebe ebi ebk ebm ec- eca ecb ecc ecd ece eci eck ecm ed- eda edb edc edd ede edi edk edm eea eeb eec eed eee eek eem eia eib eic eid eie eii eik eim eka ekb ekc ekd eke eki em- ema emb emc emd eme emi emk emm i-d ia- iaa iab iac iad iae iai iam iba ibb ibc ibd ibe ibi ibk ibm ica icb icc icd ice ici ick icm ida idb idc idd ide idi idk idm ie- iea iec ied iee iei iek iem iia iib iic iid iie iii iim ika ikb ikc ike iki ikk im- ima imb imc imd ime imi imm ka- kaa kab kac kad kae kai kak kam kba kbb kbc kbd kbe kbi kbk kbm kca kcb kcc kcd kce kci kck kcm kda kdb kdc kde kdk kdm ke- kea keb kec ked kee kei kek kem kia kib kic kid kie kii kik kim kkb kkc kke kki kkk kkm kma kmb kmc kmd kme kmi kmk kmm maa mab mac mad mae mai mak mam mba mbb mbc mbd mbe mbi mbk mbm mc- mca mcb mcc mcd mce mci mck mcm mda mdb mdc mdd mde mdi mdk mdm mea meb mec med mee mei mek mem mi- mia mib mic mid mie mii mik mim mka mkb mkc mkd mke mkk mkm mma mmb mmc mmd mme mmi mmk mmm