Updated 'x' to 'O'

Rule function for 'x' has changed since creation of this rule set. Replaced 'x' with 'O' to bring back originally intended rule functionality.

rules/best64.rule

@@ -80,9 +80,9 @@ D4
 
 ## rotates
 +5 ] } } } } '4
-x02 { { { { { {
+O02 { { { { { {
 } ] ] {
-} } -0 x12
+} } -0 O12
 } } }
 } } } } '4
 } } } } } '5
@@ -90,13 +90,13 @@ x02 { { { { { {
 
 ## unknown
 *04 +0 '4
-*05 x03 d '3 p1
+*05 O03 d '3 p1
 +0 +0 +0 +0 +0 +0 +0 +0
-+0 +0 +0 x12
-Z4 '8 x42
-Z5 '6 x31 ] p1
-Z5 *75 '5 { x02
-d x28 Y4 '4 d
-f *A5 '8 x14
-p2 '7 p1 x58
-x14 d p2 '6
++0 +0 +0 O12
+Z4 '8 O42
+Z5 '6 O31 ] p1
+Z5 *75 '5 { O02
+d O28 Y4 '4 d
+f *A5 '8 O14
+p2 '7 p1 O58
+O14 d p2 '6