from sys import stdin, stdout
input = lambda: stdin.readline().rstrip()
write = stdout.write

def main():
    A, B = map(int, input().split())

    ans = A * B
    if not A % 100 and not B % 100:
        mod1 = A % 10 ** (len(str(A)) - 1)
        mod2 = B % 10 ** (len(str(B)) - 1)
        if not mod1 and not mod2:
            ans //= 10
    else:
        if not -99999999 <= ans <= 99999999:
            ans = 'E'
    print(ans)

main()