null_expected(ListData) ->
    TrimData = string:substr(ListData, 1, erlang:length(ListData)-1),
    Cond1 = string:str(TrimData, [10,10]) =/= 0,
    if
        Cond1 == true ->
            true;
        true ->
            Cond2 = string:str(TrimData, [10,0,10,0]) =/= 0,
            if
                Cond2 == true ->
                    true;
                true -> false
            end
    end.