class HAPPY_DAY
    def initialize
        @days = {
                    1 => 31,
                    2 => 28,
                    3 => 31,
                    4 => 30,
                    5 => 31,
                    6 => 30,
                    7 => 31,
                    8 => 31,
                    9 => 30,
                    10 => 31,
                    11 => 30,
                    12 => 31
                }
        @cnt = 0
    end

    def happy_day
        (1..12).each do |month|
            (1..@days[month]).each do |day|
                d1, d2 = day.to_s.split("")
                d2 = "0" if d2.nil?
                @cnt += 1 if month == d1.to_i + d2.to_i
            end
        end
        @cnt
    end

    def dataoutput
        puts happy_day
    end

    def run
        dataoutput
    end
end

if $0 == __FILE__
    HAPPY_DAY.new.run
end