Umutwe w'ibintu byoroshye, byumye kandi bicana — ibishishwa byaciwe (sederi, biriki), ibyatsi byumye, ubwoya bw'ibimera byo mu bishanga cyangwa umwenda watwitswe — bibonezwa nk'icyari kitegereye. Ufata urumuri cyangwa amakara ava mu muriro w'ukwinyuranya cyangwa ku ibuye ry'umuriro n'icyuma, hanyuma ugahuhwa buhoro kugeza umuriro ucanye. Ni cyo cy'ingenzi mu gucana umuriro kuva mu gihe cy'amabuye.