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%%MatrixMarket matrix coordinate real general

4 11 23

1 2          1

1 3          1

1 4          1

1 5          1

1 7          1

1 9          1

1 10          1

2 1          1

2 2          1

2 5          1

2 7          1

2 10          1

3 1          1

3 6          1

3 9          1

3 11          1

4 1          1

4 4          1

4 5          1

4 8          1

4 9          1

4 10          1

4 11          1