package net.ipipip0129.kotlin.yukicoder

import kotlin.math.abs
import kotlin.math.pow

fun checkNum(x: Int): Boolean = abs(x) % 10.0.pow(abs(x).toString().length - 1).toInt() == 0

fun main(args: Array<String>) {
    val numList = readLine()!!.split(" ").map { it.toInt() }
    if (checkNum(numList[0]) && checkNum(numList[1])) {
        print(((numList[0].toLong() * numList[1].toLong()) / 10))
    } else {
        val ans = numList[0].toLong() * numList[1].toLong()
        if (-99999999 <= ans && ans <= 99999999) {
            print(ans)
        } else {
            println("E")
        }
    }
}