The Arabic Alphabet has 28 letters. The shape of these letters changes depending on their position in the word, whether isolated; in the beginning of the word (initial); in the middle (medial); or at the end (final). http://www.sakkal.com/Arab_Calligraphy_Art1.html
Get the Arabic word for "thank you" as a thank you towards those who have done something towards you in your life. Maybe helping you, being there for you, hurting you, doing just about anything because without anyone doing what they did, you wouldn't be where you are today.