function checkJoiners()
    local checker = true
    local players = {}
    local vocations = {false,false,false,false}
    for i = 1, #standing_positions do
        local cid = getTopCreature(standing_positions[i]).uid
        if cid > 0 then
            if getPlayerStorageValue(cid,player_quest) < 2 then
                table.insert(players,cid)
            end
        end
        local number = isKnight(cid) and 4 or isPaladin(cid) and 3 or isDruid(cid) and 2 or isSorcerer(cid) and 1 or 5
        vocations[number] = true
    end
    if #players < 4 then
        checker = false
    end
    for _, found in ipairs(vocations) do
        if not found then
            checker = false
            break
        end
    end

    return checker and players or false
end