in consecutive number order. (A 1 may not follow a 13.) {| |- style="line-height: 3em;" | Example run: || |} A group is made from three or four same-value tiles in distinct colors. For example: red 3, blue 3, black 3 and yellow 3. {| |- style="line-height: 3em;" | Example group: || |} Examples of invalid sets {| |- style="line-height: 3em;" | Invalid because numbers are not consecutive: || |- style="line-height: 3em;" | Invalid because numbers in a run must all be the same color: || |- style="line-height: 3em;" | Invalid because colors may not repeat in a group: || |} Example of play {| |- style="line-height: 3em;" | Tiles already out-played: || |- style="line-height: 3em;" | Own tiles: || |- style="line-height: 3em;" | Recombined result: || and |} Manipulating existing tiles During a player's turn, sets of tiles that have already been played may be manipulated to allow more tiles to be played. At the end of the turn, all played tiles must be in valid sets. Shifting a run Players may add the appropriate tile to either end of a run and remove a tile from the other end for use elsewhere. If red 3, 4, and 5 have already been played, a player may add the red 6 to the end and remove the 3 for use elsewhere. Splitting a run Players may split long runs and insert the corresponding tiles in the middle. Thus, if blue 6, 7, 8, 9, and 10 are already a run, the player may insert their own 8 to make two runs: 6, 7, 8 and 8, 9, 10. Substituting in a group Players may replace any of the tiles in a three-tile group with a tile of the fourth color and the same value. If blue 6, red 6, and yellow 6 are already a group, the player may add the black 6 and remove any one of the other three for use elsewhere. Removing tiles So long as the remaining tiles form a valid run, tiles can be removed from the ends of runs. Any one tile may be removed from a four-tile group. Joker substitution A joker may not be retrieved before the initial meld. A joker can be retrieved from a set by replacing it with a tile of the same numerical value and colour it represents. The tile used to replace the joker can come from