diff -u -r1.1 -r1.2
--- HPSECalUtils.java	23 Aug 2012 18:48:18 -0000	1.1
+++ HPSECalUtils.java	23 Aug 2012 20:38:48 -0000	1.2
@@ -5,7 +5,7 @@

 /**
  *
  * @author Sho Uemura <[log in to unmask]>

- * @version $Id: HPSECalUtils.java,v 1.1 2012/08/23 18:48:18 meeg Exp $

+ * @version $Id: HPSECalUtils.java,v 1.2 2012/08/23 20:38:48 meeg Exp $

  */
 public class HPSECalUtils {
 

@@ -40,4 +40,19 @@

             }
         }
     }

+
+    public static int getHVGroup(int x, int y) {
+        int absy = Math.abs(y);
+        if (x > 0 || x <= -8) {
+            return (23 - Math.abs(x)) / 2 + 1;
+        } else {
+            if (x == -7 && absy == 5) {
+                return 8;
+            } else if (x >= -4) {
+                return 12 - Math.max(x + 4, absy - 2);
+            } else {
+                return 12 - Math.max(-5 - x, absy - 2);
+            }
+        }
+    }

 }