Pande ikozwe mubice bitatu cyangwa byinshi bya milimetero imwe yuburebure cyangwa ikibaho cyoroshye kometseho kanda.Ibisanzwe ni pani-eshatu, pani-eshanu, icyenda-pani na cumi na zibiri (bakunze kwita pani-eshatu, ikibaho cy-ijanisha-gatanu, ikibaho cy-icyenda, ninama-cumi na zibiri ...
Soma byinshi