#include <bits/stdc++.h>
using namespace std;

using i32 = int32_t;using i64 = int64_t;using u32 = uint32_t;using u64 = uint64_t;using f32 = float;using f64 = double;using f80 = long double;
using i128 = __int128_t;using u128 = __uint128_t;
using vi32 = vector<i32>;using vi64 = vector<i64>;using vu32 = vector<u32>;using vu64 = vector<u64>;
using vvi32 = vector<vector<int32_t>>;using vvi64 = vector<vector<int64_t>>;using vvu32 = vector<vector<uint32_t>>;using vvu64 = vector<vector<uint64_t>>;
using pi32 = pair<i32,i32>;using pi64 = pair<i64,i64>;using Pu32 = pair<u32,u32>;using Pu64 = pair<u64,u64>;
using vpi32 = vector<pi32>;using vpi64 = vector<pi64>;using vpu32 = vector<Pu32>;using vpu64 = vector<Pu64>;

int main() {
  i64 a, b, c, d, e, f;
  cin >> a >> b;
  if (a == 0 || b == 0) {
    cout << 0 << endl;
    return 0;
  }
  c = abs(a);
  d = abs(b);
  e = 0;
  f = 0;
  while (c % 10LL != 0) {
    c /= 10;
    e++;
  }
  while (d % 10LL != 0) {
    d /= 10;
    f++;
  }
  if (c > 9 || d > 9 || e < 2 || f < 2) {
    cout << (abs(a * b) < 100000000LL ? to_string(a * b) : "E") << endl;
    return 0;
  }
  cout << a * b / 10LL << endl;
  return 0;
}