{
    /(sysB2Bits)
        /
            /(b2sys)
                (b)
                    /(zq)(lb)(hb!)
                        /
                            /
                                /
                                    /
                                        [hb!]
                                    [b2sys]
                                /
                                    [lb]
                                [outSystem]
                            /
                                [0]
                            [outSystem]
                        /
                            /
                                [sysB2Bits]
                            /
                                [1]
                            [outSystem]
                        [zq]
                    [b]
            [YC]
        [inSimple]
    [YC]
|
    sysB2Bits
}

{
    /
        [ID]
    /(sysBits2B)
        (callback)
            /
                (in-zq)
                    /
                        /
                            (in-lb)
                                /
                                    (b)
                                        /
                                            /
                                                [b]
                                            /
                                                [in-lb]
                                            [b!]
                                        [callback]
                                [sysBits2B]
                        [inSimple]
                    /
                        /
                            /[ID][sysBits2B]
                        /
                            /[b0][callback]
                        [outSystem]
                    [in-zq]
            [inSimple]
    [YC]
|
    sysBits2B
}