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.
Philip Edward Phil Hartman (September 24, 1948 - May 28, 1998) was a Canadian born American actor and comedian. He was a recurring guest star on The Simpsons, frequently voicing Lionel Hutz and Troy McClure. He also voiced many one time characters. His characters were retired after his death in 1998.