public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( in ) ;
  int counter = 0 ;
  for ( int i = 0 ;
  i < 12 ;
  i ++ ) {
    String str = sc . nextLine ( ) ;
    if ( str . contains ( "r" ) ) counter ++ ;
  }
  out . println ( counter ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( in ) ; int counter = 0 ; for ( int i = 0 ; i < 12 ; i ++ ) { String str = sc . nextLine ( ) ; if ( str . contains ( " r " ) ) counter ++ ; } out . println ( counter ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (identifier))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (string_literal)))) consequence: (expression_statement (update_expression (identifier)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))))