As mulligans aren't covered by strict rules – except to prohibit them – there are many variations of the practice among groups of players who do allow them in friendly games. If a mulligan is allowed to be used to replay any shot, each player is typically limited to 18 per round, sometimes 9 in the first 9 holes and 9 in the second nine. Traditionally, mulligans can only be played on tee shots (which are notoriously difficult to make accurately), and sometimes they may only be played on the first tee shot of the round. In the case of a mulligan used to replay the first tee shot, multiple "mulligans" may be allowed under different names (Finnegan, Branagan, Flanagan or Craig) until the player has hit a playable tee shot.