(Solved): 56 is not the answer !  From the official website of a major league baseball team, it is found ...

From the official website of a major league baseball team, it is found that there were nine active players on roster avallable to play infield, not including the catcher. Assuming that these nine players could play any infield position but not catcher, how many possible assignments could the manager have made for the four infield positions? The manager had possible assignments for the four infield positions. (Type a whole number.)