Only the words that are made up of them do. The individual letters in a word don't mean anything. By themselves, they simply indicate what sound you're supposed to make. For example, the letter s indicates the s sound (which sounds like ssssss).
About Rupert Boneham. Rupert Boneham (born January 27, 1964) is an American mentor for troubled teens, who became known to reality television audiences in 2003 as a contestant on Survivor: Pearl Islands where he placed 8th. He later appeared on the All Stars, Heroes vs. Villains, and Blood vs. Water seasons of Survivor, placing 4th, 6th, and 20th respectively.
Lesley Nicol (born 19 June 1953 in Plymouth, Devon) is an English actress who is best known for her starring role as Beryl Patmore in the ITV drama series Downton Abbey, and for her roles as Mrs. Beaver in the 1988 BBC adaptation of The Lion, the Witch and the Wardrobe and as the Queen Giant in The Silver Chair (1990).