public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  String inp = sc . nextLine ( ) ;
  int ans = 0 ;
  int len = inp . length ( ) ;
  int i = 0 ;
  while ( len > 0 ) {
    int ah = inp . charAt ( i ) ;
    if ( ah == 72 || ah == 57 || ah == 81 ) {
      ans ++ ;
    }
    len -- ;
    i ++ ;
  };
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; String inp = sc . nextLine ( ) ; int ans = 0 ; int len = inp . length ( ) ; int i = 0 ; while ( len > 0 ) { int ah = inp . charAt ( i ) ; if ( ah == 72 || ah == 57 || ah == 81 ) { ans ++ ; } len -- ; i ++ ; } ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (binary_expression left: (identifier) right: (decimal_integer_literal)))) consequence: (block (expression_statement (update_expression (identifier))))) (expression_statement (update_expression (identifier))) (expression_statement (update_expression (identifier)))))))