Find positive integers x, y, z satisfying the following properties: y is obtained by subtracting 93 from x, and z is obtained by subtracting 183 from y; furthermore, x, y and z in their base-10 representations contain precisely all the digits from 1 through 9 once (i.e. concatenating x, y and z yields a valid 9-digit Sudoku answer). Obviously, write down the concatenation of x, y and z in that order.