in its correct place; the letters of the previous word are rearranged to arrive at the new word. Sometimes there may be more than one word that fits the letters, but only one word is the correct one. The contestant has 45 seconds to complete the pyramid, and there is no limit on the number of words the contestant may try before arriving at the correct one. When each word is correctly identified, the clock stops and the player may choose to continue or to stop and take the winnings. If the player chooses to continue, then the new letter is revealed and the clock started again from where it left off. If the player then fails to get the word within the remaining time, he/she wins only £100. The prize money for a contestant who stops and takes the money (or who completes the pyramid by getting the eight-letter word) is as follows: 4-letter word: £200 5-letter word: £500 6-letter word: £750 7-letter word: £1,500 8-letter word: £3,000 Before 2005, there was no prize money for a contestant who runs out of time while playing the pyramid. 2002–06 format Before the change to the most recent format, only two contestants played at a time. The first three rounds were Scramble, Crossfire and Trio, and these were played in two heats, therefore all four contestants played these three rounds. The winner of each heat went into the "semi-final", comprising the rounds Clued Up and Wordstorm. (The "final" is the solo Pyramid game.) Prior to 2005, Wordplay was played instead of Trio, and Wordstorm preceded Clued Up in the semi-final. Wordplay had two differences from the round in the more recent format: If one contestant buzzed in and failed to give the correct solution, only one more letter in the solution was revealed for the other player. The letters did not disappear from the original anagram as they were revealed in the solution as they did more recently (this does not directly affect the gameplay). Viewer puzzle Throughout the show, phone-in viewer puzzles are announced. Viewers enter by calling a premium rate telephone number, and one caller is randomly selected to solve the puzzle. Normally, three viewer puzzles are played in the course of the show, for increasing amounts of prize money. The prize values have varied throughout the show's history; initially they were typically £250, £500 and £750 or £1,000;