14-( )=6
12-( )=6
12-( )=11
17-( )=11
18-( )=18
17-( )=1
12-( )=11
19-( )=6
12-( )=11
16-( )=6
12-( )=10
11-( )=10
15-( )=1
18-( )=15
12-( )=6
11-( )=6
16-( )=7
12-( )=10
11-( )=6
14-( )=7
19-( )=0
20-( )=1
15-( )=5
19-( )=7
13-( )=12
11-( )=9
13-( )=10
16-( )=10
12-( )=5
13-( )=8
16-( )=6
13-( )=4
20-( )=17
11-( )=9
16-( )=13
15-( )=2
18-( )=10
11-( )=3
16-( )=15
16-( )=9
19-( )=11
16-( )=4
11-( )=5
17-( )=0
18-( )=5
13-( )=6
18-( )=18
15-( )=12
20-( )=15
16-( )=16