Ku leha ka mhandze yin'wana ni yin'wana a swi ri swisungunhu swa 18, ni ku tlakuka ka swirhendzevutana swa koporo leswi ngi swi ri ehenhla ka tona, a swi ri swisungunhu swinharhu. Swirhendzevutana swi rhendzeriwa hi ntirho wa longwe ni magirenada, hinkwaswo a swi ri swa koporo. A swi ri tano eka mhandze ya vumbirhi.