For every tree one node is singled out and is called the root.
Waxaa sidoo kale hoos loo dhigay calanka wadankaas, si loo maamuuso 157 qof oo isugu jiray rakaab iyo shaqaale la socday dayuurad nooceedu ahaa Boeing 737 oo shalay burburtay, daqiiqado yar ka dib markii ay ka kacday garoonka dayuuradaha Bole, kuwaasoo ka soo kala jeeday illaa 37 dal.