-ic a-a a-b a-c a-i aaa aab aac aag aai aap aay ab- aba abb abc abg abi abp aby ac- aca acb acc acg aci acp acy ag- aga agb agc agg agi agp agy ai- aia aib aic aig aii aip aiy ap- apa apb apc apg api app apy ay- aya ayc ayi ayp b-p baa bab bac bag bai bap bay bba bbb bbc bbg bbi bbp bby bca bcb bcc bcg bci bcp bcy bga bgb bgc bgg bgi bgp bi- bia bib bic big bii bip biy bpa bpb bpc bpg bpi bpp bpy by- bya byc byg byi byp c-- caa cab cac cag cai cap cay cba cbb cbc cbg cbi cbp cby cca ccb ccc ccg cci ccp cga cgb cgc cgg cgi cgp cgy ci- cia cib cic cig cii cip cpa cpb cpc cpg cpi cpp cya cyb cyc cyg cyp g-p gaa gab gac gag gai gap gay gba gbc gbg gbi gbp gby gca gcb gcc gcg gci gcp gga ggb ggc ggg ggi ggp gia gib gic gig gii gip giy gpa gpb gpc gpg gpi gpp gy- gya gyb gyp ia- iaa iab iac iag iai iap iba ibb ibc ibg ibi ibp iby ica icb icc icg ici icp icy iga igb igc igg igi igp igy iia iib iic iii iip ipa ipb ipc ipg ipi ipp ipy iya iyc iyy p-p paa pab pac pag pai pap pay pba pbb pbc pbg pbi pbp pby pca pcb pcc pcg pci pcp pga pgb pgc pgg pgi pgp pgy pia pib pic pig pii pip ppa ppb ppc ppg ppi ppp py- pya pyb pyc pyg yaa yab yac yag yai yap yay ybc ybg ybi ybp yby yca ycc yci ycp ycy yga ygc yig yii yip ypa ypg yyb yyc yyg yyy