SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 2)
    Identifier k
    Function groupArrayInsertAt (children 2)
     ExpressionList (children 2)
      Function toString (children 1)
       ExpressionList (children 1)
        Identifier x
      Identifier x
     ExpressionList (children 2)
      Literal \'-\'
      Literal UInt64_10
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Identifier number (alias k)
           Identifier number (alias x)
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
          Literal UInt64_11
   ExpressionList (children 1)
    Identifier k
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier k
