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

A,B = ascan

if A == 0 || B == 0
    p 0
else
    as = A.abs.to_s
    bs = B.abs.to_s
    az = as[1..-1]
    bz = bs[1..-1]
    if az=~/^0+$/ && az.size >= 2 && bz=~/^0+$/ && bz.size >= 2
        p A*B/10
    else
        if -99999999 > (A*B) || (A*B) > 99999999 
            puts "E"
        else
            p A*B
        end
    end
end