1в.
15-12= 14-13=
16-13= 18-16=
17-11= 15-13=
19-13= 19-17=
14-12= 18-12=
18-15= 17-13=
13-12= 15-14=
2в.
16-12= 15-13=
17-13= 19-16=
18-11= 16-13=
19-12= 18-17=
15-12= 19-14=
19-15= 18-13=
14-12= 16-14=
