The purpose of this phase is to learn the following alternative spellings of letter/sounds previously:
ou /ow/, ea /ee/, ay /ai/, ie /igh/, ue /oo/, ue /yoo/, oy /oi/, aw /or/, ir /ur/, wh /w/, ph /f/, au /or/, ew /o-o/, ew /yoo/, oe /oa/,
a-e /ai/, e-e /ee/, i-e /igh/, o-e /oa/, u-e /o-o/, u-e /yoo/, si /zh/
su /zh/
