Well done! That's the right answer.
Hint



Test
3
+
2
+
3
=
2
+
2
+
2
=
3
+
3
+
1
=
1
+
3
+
2
=
3
+
2
+
1
=
4
+
+
=
3
+
+
=
1
+
+
=
3
+
+
=
+
+
=
0
1
2
3
4
5
6
7
8