Ku hlayela ka arch ya picket fence
Boxa swipimelo leswi lavekaka hi timilimitara
H - ku leha ka rirhangu ra le hansi
Y - ku tlakuka lokukulu ka rirhangu
X - mpfhuka exikarhi ka tisenthara ta swiporo swa le handle
Z - ku anama ka xiporo xa picket
K - Nhlayo ya swiporo eka xiyenge
D - Ku hambana exikarhi ka swiporo
Loko ku ri ku leha
Y > H
Loko ku ri ku leha
Y < H