{
    /(b_to_c)
        (b)
            /(zq)(lb)(hb!)
                /
                    /
                        /[c0]/[c1][lb]
                    /
                        /</[hb!][b_to_c]>[c_double]
                    [c_add]
                /
                    [c0]
                [zq]
            [b]
    [YC]
|
    b_to_c
}