Let's count till 20!!!

One	E-na
Two	The-o
Three	Tri-a
Four	Te-ssera
Five	Pen-de
Six	Ex-ksi
Seven	Ep-ta
Eight	Ock-to
Nine	en-nea
Ten	The-ka
Eleven	en-de-ka
Twelve	tho-the-ka
Thirteen	the-ka-tri-a
Fourteen	the-ka-tess-era
Fifteen	the-ka-pen-de
Sixteen	the-ka-ec-ksi
Seventeen	the-ka-efp-ta
Eighteen	the-ka-ock-to
Nineteen	the-ka-en-nea
Twenty	i-kosi