public static void main ( String [ ] args ) throws IOException {
  Scanner sc = new Scanner ( System . in ) ;
  String s = sc . next ( ) ;
  System . out . println ( s . matches ( "A[a-z]+C[a-z]+" ) ? "AC" : "WA" ) ;
  sc . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { Scanner sc = new Scanner ( System . in ) ; String s = sc . next ( ) ; System . out . println ( s . matches ( " A [ a - z ] + C [ a - z ] + " ) ? " AC " : " WA " ) ; sc . close ( ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) (throws (type_identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (ternary_expression condition: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal))) consequence: (string_literal) alternative: (string_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))