-module(solution).
-export([main/0]).

read(X) ->
    case io:fread("", "~d") of
        eof -> ok;
        {ok, [N]} -> if (X rem 2=/=0)-> io:format("~p~n", [N]);
                         (X rem 2 =:=0)-> ok
            end,
        read(X+1)
    end.

main() ->
    {ok,[X]} = io:fread("", "~d"),
    read(1).