Separable and Inseparable.
108. Which ones are Separable?
Oi and Oy.
109. What is an Improper Diphthong?
The union of two vowels in a syllable, one of which is silent.
110. By what other name are they known?
Digraph.
111. How many Digraphs are there?
Twenty-five.
112. Name them.