rec ree rei rek rel rep rer res reu ria rib ric rie rii rik ril rip rir ris rkb rkc rke rkk rkp rks rku rla rlc rle rli rll rlp rlr rls rlu rpa rpb rpc rpe rpi rpk rpl rpp rpr rps rpu rra rrb rrc rri rrk rrl rrp rrr rrs rru rsa rsb rsc rse rsi rsk rsl rsp rsr rss rsu rua rub ruc rue rui ruk rup rur rus ruu saa sab sac sae sai sak sal sap sar sas sau sba sbb sbc sbe sbi sbk sbl sbp sbr sbs sbu sca scb scc sce sci sck scl scp scr scs scu se- sea seb sec see sei sek sel sep ser ses seu sia sib sic sie sii sik sil sip sir sis siu sk- ska skb skc ske ski skk skl skp skr sks sku sla slb slc sle sli slk sll slp slr sls slu spa spb spc spe spi spk spl spp spr sps spu sr- sra srb src sre sri srk srl srp srr srs ss- ssa ssb ssc sse ssi ssk ssl ssp ssr sss ssu sua sub suc sue sui suk sul sup sur sus suu ua- uaa uab uac uae uai uak ual uap uar uas uau uba ubb ubc ube ubi ubk ubl ubp ubr ubs ubu uca ucb ucc uce uci uck ucl ucp ucr ucs ucu uea ueb uec uee uei uel uep uer ues uia uib uic uie uii uil uip uir uis uiu uka ukb ukc uke uki ukk ukl ukp ukr uku ula ulb ulc ule uli ulk ull ulp ulr uls ulu up- upa upb upc upe upi upk upp upr ups upu ur- ura urb urc ure uri urk url urp urr urs uru usa usb usc use usi usk usl usp usr uss usu uua uuc uue uur uus uuu

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