10
+
6
=
12
+
9
=
21
+
71
=
45
+
13
=
38
+
7
=
18
+
72
=
15
+
30
=
29
+
71
=
39
+
4
=
37
+
22
=
31
+
41
=
7
+
4
=
19
+
15
=
57
+
32
=
23
+
77
=
7
+
23
=
13
+
39
=
39
+
26
=
8
+
1
=
38
+
9
=