def aho(papa)
    i = 0
    k = 0
    l = []
    lp = []

    while i < papa.length
        if papa[i] == "+"
            k += 1
        elsif papa[i] == "-"
            k -= 1
        elsif papa[i] == "<"
            l << k
            k = 0
        elsif papa[i] == ">"
            k += l.pop
        elsif papa[i] == "("
            lp << [i,1]
        elsif papa[i] == ")"
            if lp[-1][1] == 1
                lp[-1][1] = 0
                i = lp[-1][0]
            else
                lp.pop
            end
        elsif papa[i] == ","
            k=0
        end

        i += 1
    end

    k
end

5.times do
  puts aho("(((((((++)-)-<)>>-)<)<)>,>>)")
end