input = gets.split(" ")
a = input[0]
b = input[1]
c = input[2]


    case a
    when "?"
        if b == "2"
            puts 4
        elsif b == "3"
            puts 1
        end
    when "2"
        if b == "3"
            puts 1
        elsif b == "?"
            puts 14
        end
    when "3"
        if b == "2"
            puts 4
        elsif b == "?"
            puts 14
        end
    end