-- | Construct a plain bob lead head.
-- Returns the first plain bob lead head on @n@ bells with @h@ hunt bells.
plainBobLeadHead     :: Length -- ^ Number of bells, @n@
                     -> Length -- ^ Number of hunt bells, @h@
                     -> Row
plainBobLeadHead _ _ = error "Not implemented"
plainBobLeadHead     :: Length -- ^ Number of bells, @n@
                     -> Length -- ^ Number of hunt bells, @h@
                     -> Row
plainBobLeadHead _ _ = error "Not implemented"
plainBobLeadHead _ _ = error "Not implemented"