public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  String s = sc . next ( ) ;
  boolean t = true ;
  for ( int i = 0 ;
  i < s . length ( ) && t ;
  i ++ ) {
    if ( s . charAt ( i ) == '*' ) {
      for ( int j = 1 ;
      i + 4 * j < s . length ( ) ;
      j ++ ) {
        if ( s . charAt ( i + j ) == '*' && s . charAt ( i + 2 * j ) == '*' && s . charAt ( i + 3 * j ) == '*' && s . charAt ( i + 4 * j ) == '*' ) {
          System . out . println ( "yes" ) ;
          t = false ;
          break ;
        }
      }
    }
  }
  if ( t ) {
    System . out . println ( "no" ) ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; String s = sc . next ( ) ; boolean t = true ; for ( int i = 0 ; i < s . length ( ) && t ; i ++ ) { if ( s . charAt ( i ) == ' * ' ) { for ( int j = 1 ; i + 4 * j < s . length ( ) ; j ++ ) { if ( s . charAt ( i + j ) == ' * ' && s . charAt ( i + 2 * j ) == ' * ' && s . charAt ( i + 3 * j ) == ' * ' && s . charAt ( i + 4 * j ) == ' * ' ) { System . out . println ( " yes " ) ; t = false ; break ; } } } } if ( t ) { System . out . println ( " no " ) ; } }
(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 (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (boolean_type) declarator: (variable_declarator name: (identifier) value: (true))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (binary_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) right: (identifier)) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (character_literal))) consequence: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (identifier)))) right: (character_literal)) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier))))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier))))) right: (character_literal))) right: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (binary_expression left: (decimal_integer_literal) right: (identifier))))) right: (character_literal)))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal)))) (expression_statement (assignment_expression left: (identifier) right: (false))) (break_statement))))))))) (if_statement condition: (parenthesized_expression (identifier)) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (string_literal))))))))