- class Main 
- { 
-     public static void-  main (String[]-  args )
 
-     { 
-         boolean[] george = {false, true}; 
-         for (boolean a : george) 
-         { 
-             for (boolean b : george) 
-             { 
-                 for (boolean c : george) 
-                 { 
-                     for (boolean d : george) 
-                     { 
-                         boolean x = a ^ b ^ c ^ d; 
-                         boolean y = a != b != c != d; 
-                         System- . out- . println((- x  ==-  y ) ? ":)" : ":(");
 
-                     } 
-                 } 
-             } 
-         } 
-     } 
- } 
-   
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