Today's Arabic letter is "ghayn" غ
ghayn is the 19th letter in the Arabic Script.
Her English language equivalent a rolling "R" sound pronounced from the back of the throat. Practice by rolling your "R" off the tip of your tongue and gradually move it backwards.
ع "ayn" was yesterday's letter.
غ "ghayn" is today's letter.
ف "faa" is tomorrow's letter.