def ascan; gets.split.map(&:to_i); end
def scan; gets.to_i; end

a,b = ascan

z = []

0.upto(a){|x|
    z << x
    1.upto(b){|y|
        z << (x + y*5)
    }
}

z.sort!
z.uniq!

z.shift

puts z