PlZ FRIENDS HELP ME.?

hi friend i want to know about game counter strike cd key.can any body tell me of how many characters are in key of game counter strike.i think its of 13.but whn i going to start this game i got a pop up menu to insert cd key of 25 character.any body solve my questin.and if possible pls send me key too..plzz i need that so muchhhhh....