{
    (n_zq)(n_lb)(n_h)
        /(n_to_bx)
            (n)
                /
                    /
                        //[n][n_h][n_to_bx]
                    /
                        //[n][n_lb][bool]
                    [b!]
                /
                    [b0]
                /[n][n_zq]
        [YC]
|
    _n_to_b
}