import Foundation
let s = readLine()!.split(separator: " ")
let n = s.map{Int($0)!}
var t = s.map{$0.replacingOccurrences(of: "0", with: "")}.map{abs(Int($0)!)}
var a = n[0] * n[1]


if t[0] <= 9 && t[1] <= 9 && n[0] % 100 == 0 && n[1] % 100 == 0{
    print(a / 10)
}else{
    if -99999999 <= a && a <= 99999999{
        print(a)
    }else{
        print("E")
    }
}