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14













-  0

15













-  1

18













-  1

17 - 4 =













17 - 6 =













12 - 3 =













19

- 6













8

- 7













6 - 6 =













15













-  5

16













-  5

19













-  2

9

- 9













13 - 7 =













9

- 7













8 - 8 =













8 - 2 =

20

- 2













12 - 5 =

4 - 2 =













17 - 2 =













19

-  0

7 - 5 =













18 - 9 =













11













-  6

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