import math
import sys
from collections import deque
from itertools import accumulate
from typing import List, Tuple

int1 = lambda x: int(x) - 1
input = lambda: sys.stdin.readline().rstrip('\n')
ii = lambda: int(input())
vi = lambda: list(map(int, input().split()))
vi1 = lambda: list(map(int1, input().split()))


def dbg(*args, **kwargs):
    print(*(repr(arg) for arg in args), *(f'{k}: {repr(v)}' for k, v in kwargs.items()),
          sep='; ', file=sys.stderr, flush=True)


def x(a):
    a = str(abs(a))
    if len(a) < 3:
        return False
    return int(a[1:]) == 0


def main():
    a, b = vi()
    if x(a) and x(b):
        return a * b // 10
    ans = a * b
    if abs(ans) >= 10 ** 8: return 'E'
    return ans


def _start():
    if (ret := main()) is not None:
        print(*ret) if isinstance(ret, List) or isinstance(ret, Tuple) else print(ret)


if __name__ == '__main__':
    _start()