### `++bet`

Axis syntax `-`, `+`

Parse the hep and lus axis syntax.

Source
------

    ++  bet  ;~(pose (cold 2 hep) (cold 3 lus))             ::  axis syntax - +

Examples
--------

        ~zod/try=> (scan "-" bet)
        2
        ~zod/try=> (scan "+" bet)
        3



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