-er c-- ccc cce ccl ccr cct ccu ce- cec cee cel cer cet ceu cl- clc cle cll clr clt clu crc cre crl crr crt cru ctc cte ctl ctr ctt ctu cuc cue cul cur cut cuu ec- ecc ece ecl ecr ect ecu eec eee eel eer eet elc ele ell elr elt elu erc ere erl err ert eru etc ete etl etr ett etu eu- euc eue eul eur eut lcc lce lcl lcr lct lcu lec lee lel ler let leu llc lle lll llr llt llu lrc lrr lrt lru ltc lte ltl ltr ltt ltu luc lue lul lur lut luu rcc rce rcl rcr rct rcu re- rec ree rel rer ret reu rlc rle rll rlr rlt rlu rrc rrl rrr rrt rru rtc rte rtl rtr rtt rtu ruc rue rur rut ruu tcc tce tcl tcr tct tcu te- tec tee tel ter tet teu tlc tle tll tlr tlt tlu trc tre trl trr trt tru ttc tte ttl ttr ttt ttu tuc tue tul tur tut tuu ucc uce ucl ucr uct ucu uec uee uel uer uet ulc ule ull ulr ult ulu ur- urc ure url urr urt uru utc ute utl utr utt utu uuc uue uur uut uuu