--[[

Add this as lua action before any internal and external call
to the main-inbound-queue.

--]]
local tt={}

for id=1,70 do
    local level = channel['MDC_SKILL-' .. id]:get()
    if level ~= nil and level ~= '' then
        table.insert(tt,id)
    end
end
local topic = table.concat(tt,'_')
channel.MDC_TOPIC = topic