let n = readLine()!.split(separator: " ").map{Int($0)!}
var a = n[0] * n[1]
if n[0] % 100 == 0 && n[1] % 100 == 0{
    print(a / 10)
}else{
    if -99999999 < a && a < 99999999{
        print(a)
    }else{
        print("E")
    }
}