18-(     )=14

16-(     )=8

16-(     )=16

20-(     )=19

11-(     )=9

11-(     )=5

12-(     )=3

17-(     )=9

12-(     )=9

15-(     )=14

18-(     )=15

12-(     )=5

20-(     )=11

15-(     )=1

16-(     )=11

18-(     )=10

14-(     )=1

16-(     )=7

17-(     )=0

17-(     )=6

14-(     )=0

17-(     )=14

19-(     )=13

14-(     )=5

16-(     )=5

20-(     )=19

20-(     )=8

20-(     )=9

20-(     )=12

12-(     )=3

19-(     )=16

14-(     )=5

15-(     )=1

15-(     )=1

19-(     )=12

19-(     )=4

12-(     )=2

19-(     )=10

14-(     )=13

16-(     )=16

17-(     )=16

11-(     )=0

11-(     )=10

17-(     )=7

16-(     )=9

18-(     )=14

13-(     )=2

13-(     )=13

13-(     )=1

19-(     )=14