+---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | C | D |  | I | H |  | E | G |  | F | B |  | E | I |  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | B | H |  | A | G |  | J | C |  | D | F |  | A | J |
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | A | E |  | B | G |  | H | J |  | H | E |  | C | B |  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | I | G |  | C | F |  | F | I |  | A | D |  | D | J |
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | G | I |  | F | D |  | B | E |  | H | J |  | H | F |  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | A | D |  | B | E |  | C | G |  | J | I |  | A | C |
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | E | F |  | I | J |  | B | A |  | C | G |  | D | E |  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | F | H |  | J | H |  | A | D |  | G | C |  | I | B |
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | J | B |  | C | D |  | F | D |  | B | A |  | H | G |  
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+ 
  | C | J |  | E | A |  | H | I |  | I | E |  | G | F |
  +---+---+  +---+---+  +---+---+  +---+---+  +---+---+

Each of the 25 blocks of four letters shown above can be rotated about its center, either 90^o clockwise, 90^o anti-clockwise or 180^o. When all the blocks are in their correct orientations, all the ten rows and columns contain the letters A to J exactly once.

Sixteen of the blocks shown above are not in their correct orientations. Which 16 out of the 25 blocks have been rotated and in which direction(s)?