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

public static void main ( String [ ] args ) throws IOException { String str = ( new Scanner ( System . in ) ) . next ( ) ; String ans = str . matches ( " ^ A [ a - z ] + C [ a - z ] + $ " ) ? " AC " : " WA " ; System . out . println ( ans ) ; }
(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: (method_invocation object: (parenthesized_expression (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier))))) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (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: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))