Igishushanyo mbonera
Kubabarana mu bice byose byumubiri, ibyumviro bitanu birahujwe, ibyumviro byonyine birashobora gukiza ubugingo, kandi ubugingo bwonyine ni bwo bushobora gukiza ibyumviro bitanu.
Muri rusange igishushanyo mbonera, icupa ryiza cyane ryamacupa yumubiri, igituba cyamazi kidasanzwe, agacupa kicupa ryicyuma, icupa ryimyenda yubukonje, umubiri mwiza kandi urangirira hejuru.
