Arranging Coins

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					     Arranging Coins
My sister was fooling around with her
  money the other night and left the
 coins in a pattern of four rows with
 four coins in each row. Each row had
  exactly one penny, one nickel, one
 dime and one quarter; no row, either
 horizontal or vertical (or even the
 diagonals) had more than one coin of
              each kind.
     How were the coins arranged?