Nyemba nthawizonse zimatengedwa kuti ndizomwe zimakhala zotsika kwambiri komanso zopangidwa mosavuta, zomwe zimapereka mphamvu zamphamvu, ndipo izi ndi zoona kwa mitundu yambiri (izi zikuwonetsedwa m'mafotokozedwe awo). Komabe, izi sizinali choncho nthawi zonse, ndipo pamayambiriro oyamba a chikhalidwe cholimidwa, chomerachi chinkagwiritsidwa ntchito ngati chokongoletsa.
