A, B = gets.split
if [A,B].all?{|s| s =~ /^[+-]?[1-9]0{2,8}$/ }
  puts (A.to_i * B.to_i) / 10
else
  ab = (A.to_i * B.to_i)
  puts (-99999999 .. 99999999).include?(ab) ? ab : 'E'
end