Kunamakhasimende avame ukungakwazi ukwenza ngempumelelo izikena zawo ngoba azikwazi ukuthola inombolo ye-S / N noma ikhodi yelayisense.
Amathiphu kulolu daba azokufundisa ukuthi ungasebenza kanjani ngokushesha isithwebuli sakho. Chofoza ezithombeni ukuze ufunde kabanzi.