-module(prog).
-export([main/0]).
 
main() ->
        loop().
loop() ->
        case io:fread( "","~d" ) of
                eof ->
                        true;
                {ok, X} ->
                        [Y] = X,
                        if
                                Y == 42 ->
                                        true;
                                true ->
                                        io:fwrite( "~B\n",X ),
                                        loop()
                        end
        end.

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1
2
10
42
11