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.
Survivor is the American version of the international Survivor reality competition television series, itself derived from the Swedish television series Expedition Robinson created by Charlie Parsons which premiered in 1997. The American series premiered on May 31, 2000, on CBS. It is hosted by television personality Jeff Probst, who is also an executive producer, and also executive produced by Mark Burnett and original creator, Charlie Parsons.