Imisumari yicyuma nibikoresho byububiko bifite ibikoresho byinshi bikoreshwa, cyane cyane mubikorwa byubwubatsi bwubu, umubare munini wibyuma byibyuma birakenewe nkibikoresho byakazi, kugirango rero utange imisumari yicyuma neza, byumvikana kandi bihendutse bisaba urutonde rwimiterere rusange, siyanse ...
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