This program sorts the bytes of its input by bubble sort
>>,
[>>,]
<<
[
    [<<]
    >>>>
    [
        <<
        [>+ <<+ >-]
        >>
        [ >+ <<<< [->] > [<] >>- ]
        <<<
        [
            [-]
            >> [>+ <-] >>
            [<<<+ >>>-]
        ]
        >>
        [
            [<+ >-] >>
        ]
        <
    ]
    <<
    [>>+ <<-]
    <<
]
>>>>
[.>>]