def F(num):
  while True:
    if num % 10 != 0:
      break
    num //= 10
  
  return True if -9 <= num <= 9 else False

A, B = [int(i) for i in input().strip().split(' ')]
a, b = F(A), F(B)

if a and b:
  print(A * B // 10)
else:
  if abs(A * B) >= 99999999:
    print('E')
  else:
    print(A * B)