Dominoes spots from one to six are generally arranged as they are on six-sided dice, but because blank ends having no spots are used, seven faces are possible, allowing 28 unique pieces in a double-six set. However, this is a relatively small number especially when playing with more than four people, so many domino sets are "extended" by introducing ends with greater numbers of spots, which increases the number of unique combinations of ends and thus of pieces. Each progressively larger set increases the maximum number of pips on an end by three, so the common extended sets are double-nine, double-12,
Billy Ward and his Dominoes hear Jackie Wilson and the Dominoes in Las Vegas in 1956 and was so impressed with Wilson's singing that he went back to Sun Studios and cut the Million Dollar Quartet's version of "Don't Be Cruel". Presley introduced the song by saying how Wilson sang it much better and then proceeded to do an impersonation of the much slower Dominoes version, backed by Johnny Cash, Carl Perkins and Jerry Lee Lewis. In late 1957, Wilson left for a solo career and was replaced by Gene Mumford of the Larks, after which the group signed a contract with Liberty Records. They