3    11    20    20
  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0
  0  0 10  1  0  3  0  8  4  6  1  7  0  5  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0  0
  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  1  0  0
  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0  0  0  0
  8  3  1 10  9  7  2  4  0  6  0  0  0  5  1  0  0  0  0  0
  5  6  0  0 10 10  1  1  6  3  0  5 10  8  0  1  0  1  0  0
  2  9  8  3  1  4 10  7  2  3  0  9 10  8  0  0  1  1  0  0
  0  0  0  0  0  0  0  0  0  0  0  0  1  0  0  0  0  0  0  0
  1 10  3  8 10  3  1  8  4  3  0  7  0  8  0  0  0  0  1  0
  4  7  2  9  5  1  6 10  8  8  0  3  5  3  0  0  0  6  0  1