(     )-6-6=4

19-(     )-3=1

13-2-(     )=5

(     )-11-7=0

15-(     )-3=0

19-10-(     )=9

19-0-(     )=16

(     )-6-10=1

15-11-(     )=2

15-13-(     )=2

17-6-(     )=2

14-(     )-0=1

12-(     )-11=0

(     )-0-5=6

13-(     )-0=2

15-5-(     )=9

(     )-3-7=1

(     )-9-3=3

15-4-(     )=8

19-6-(     )=7

15-11-(     )=4

(     )-4-6=2

16-13-(     )=3

14-(     )-4=3

15-1-(     )=5

11-2-(     )=6

20-7-(     )=0

16-(     )-0=2

18-10-(     )=2

(     )-4-8=4

19-12-(     )=5

(     )-2-7=2

18-(     )-7=1

20-(     )-9=6

13-(     )-3=7

(     )-4-5=3

14-(     )-3=0

(     )-6-3=5

(     )-8-0=3

(     )-10-0=5

(     )-5-1=9

(     )-6-3=11

19-15-(     )=4

13-(     )-9=4

11-(     )-5=3

11-(     )-5=6

16-(     )-3=1

13-(     )-0=8

12-7-(     )=3

16-(     )-6=1