#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

inline bool is(ll x) {
  string s = to_string(abs(x));
  while (s.back() == '0') s.pop_back();
  return s.size() == 1;
}

int main() {
  ll a, b;
  cin >> a >> b;
  if (is(a) && is(b)) {
    cout << a * b / 10 << endl;
  }
  else {
    ll t = a * b;
    constexpr ll thresh = 99999999;
    if (abs(t) <= thresh) {
      cout << t << endl;
    }
    else {
      cout << "E" << endl;
    }
  }
  return 0;
}