Aa, Ae, Ai, Ao, Au, Aw, Ay, Ea, Ee, Ei, Eo, Eu, Ew, Ey, Ie, Oa, Oe, Oi, Oo, Ou, Ow, Ua, Ue, Ui, and Uy.
113. What is a Trigraph?
A union of three vowels in one syllable, two of which are silent, or all three representing one sound.
114. How many Trigraphs are there?
Eight.
115. Name them.
Awe, Aye, Eau, Eou, Eye, Ieu, Iew, and Uoi.
116. What is a Tetragraph?
Union of four vowels in one syllable.
117. How many Tetragraphs are there?