a,b = gets.chomp.split(" ").map(&:to_i)
i,j = 0,0
while a%(10**(i+1)) == 0
  i += 1
end
while b%(10**(j+1)) == 0
  j += 1
end
if i > 1 && j > 1 && a/(10**i) < 10 && b/(10**j) < 10
  puts a*b/10
elsif (a*b).abs < 10**8
  puts a*b
else
  puts "E"
end