(     )-17-0=1

19-(     )-1=4

16-11-(     )=2

(     )-3-8=8

14-10-(     )=1

18-(     )-9=0

(     )-7-3=1

14-(     )-5=6

15-(     )-8=0

(     )-6-0=5

(     )-2-17=1

(     )-14-1=2

16-(     )-1=2

15-(     )-14=0

15-10-(     )=3

18-(     )-3=11

14-1-(     )=11

12-(     )-5=0

(     )-7-2=8

(     )-0-7=4

19-14-(     )=0

18-(     )-3=7

(     )-4-8=2

11-2-(     )=1

(     )-16-0=2

18-13-(     )=0

15-9-(     )=3

12-(     )-6=2

11-(     )-1=0

(     )-7-6=6

(     )-10-0=5

19-(     )-2=0

17-4-(     )=3

(     )-14-1=1

11-(     )-0=2

18-(     )-7=6

18-(     )-4=2

11-4-(     )=3

(     )-15-2=0

(     )-11-1=5

(     )-7-3=5

(     )-9-3=0

(     )-9-3=0

19-(     )-1=15

16-(     )-2=4

(     )-18-1=1

12-2-(     )=1

14-(     )-5=0

11-(     )-5=2

20-11-(     )=1