As already explained, the two tiles that are the same colour as the face up tile and one greater in number are the jokers. These tiles can be used to represent any tile the holder desires, in order to complete a set or run. For example, if the red 4 is face up, the red 5s are jokers. {Green 6, red 5, red 5, green 9} would count as a run, using jokers for the green 7 and 8. Alternatively, {yellow 10, black 10, red 5} would be a set, using the red 5 to represent the red or green 10.