-ic b-u bbb bbc bbe bbf bbi bbt bbu bcb bcc bce bcf bci bct bcu be- beb bec bee bef bei bet beu bfb bfc bfe bff bfi bft bfu bi- bib bic bie bif bii bit biu btb btc bte btf bti btt btu bub buc bue buf bui but buu c-- cbb cbc cbe cbf cbi cbt cbu ccb ccc cce ccf cci cct ccu ce- ceb cec cee cef cei cet ceu cfb cfc cfe cff cfi cft cfu ci- cib cic cie cif cii cit ciu ctb ctc cte ctf cti ctt ctu cub cuc cue cuf cui cut cuu ebb ebc ebe ebf ebi ebt ebu ec- ecb ecc ece ecf eci ect ecu eeb eec eee eef eet ef- efb efc efe eff efi eft eib eic eie eif eii eit eiu etb etc ete etf eti ett etu eu- eub euc eue euf eui eut fbb fbc fbe fbf fbi fbt fbu fcb fcc fce fcf fci fct fcu feb fec fee fef fei fet feu ffc ffe fff ffi fft ffu fib fic fie fif fii fit fiu ftb ftc fte ftf fti ftt ftu fub fue fuf fui fut fuu i-f ibb ibc ibe ibf ibi ibt ibu icb icc ice icf ici ict icu ie- iec iee ief iei iet ifb ifc ife iff ifi ift ifu iib iic iie iif iii iit iiu itb itc ite itf iti itt itu iu- iub iuc iue iui iut tbb tbc tbe tbf tbi tbt tbu tcb tcc tce tcf tci tct tcu te- teb tec tee tef tei tet teu tfb tfc tfe tff tfi tft tfu tib tic tie tif tii tit tiu ttb ttc tte ttf tti ttt ttu tub tuc tue tuf tui tut tuu ubb ubc ube ubf ubi ubt ubu ucb ucc uce ucf uci uct ucu ueb uec uee uef uei uet ufc ufe uff ufi uft ufu uib uic uie uif uii uit uiu utb utc ute utf uti utt utu uuc uue uut uuu