4
0
1
0
4
R
1
+ R
3
0
-
4
1
-
16
4
R
2
+ R
3
0
0
-
1
-
4
2
0
0
1
2
1
R
4
+ R
3
4
0
0
-
4
6
1
2
R
1
0
-
4
0
-
20
6
1
2
R
2
0
0
-
1
-
4
2
0
0
0
-
2
3
2
0
0
-
2
3
R
1
-
R
4
0
-
2
0
-
10
3
R
2
-
5 R
4
0
0
-
1
-
4
2
R
3
-
2 R
4
0
0
0
-
2
3
2
0
0
0
0
1
2
R
1
0
-
2
0
0
-
12
1
2
R
2
0
0
-
1
0
-
4
0
0
0
-
2
3
1
0
0
0
0
0
-
1
0
0
-
6
0
0
-
1
0
-
4
0
0
0
-
2
3
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