function make_judge()
    local FB, F, B = #"FizzBuzz", #"Fizz", #"Buzz"

    return function (n)
        local isF, isB = n % 3 == 0, n % 5 == 0

        if isF and isB then
            return FB
        elseif isF then
            return F
        elseif isB then
            return B
        else
            return #(n .. "")
        end
    end
end

local s = io.stdin:read("*l")

local r, judge = 0, make_judge()
s:gsub("[0-9]+", function (e) r = r + judge(tonumber(e)) end)

print(r)