#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 7;
const long long int INF = 1e12;
long long int mod(long long int a) {
  if (a >= 0)
    return a;
  else
    return (-1 * a);
}
void swap(long long int a, long long int b) {
  long long int temp = a;
  a = b;
  b = temp;
}
long long int power(long long int a, long long int b) {
  long long int result = 1;
  while (b) {
    if (b % 2) result = (result % MOD) * (a % MOD);
    a = ((a % MOD) * (a % MOD)) % MOD;
    b = b / 2;
  }
  return result;
}
bool power_check(long long int a) {
  bool ans = true;
  while (a > 1) {
    if (a % 2 == 0) {
      a = a / 2;
    } else {
      ans = false;
      break;
    }
  }
  return ans;
}
void solve() {
  int n;
  cin >> n;
  string s;
  cin >> s;
  int c = 0;
  for (int i = 0; i < n; ++i) {
    if (s[i] == '0') c++;
  }
  if (c != n - c) {
    cout << 1 << "\n";
    cout << s << "\n";
    return;
  }
  cout << 2 << "\n";
  cout << s[0] << " ";
  for (int i = 1; i < n; ++i) {
    cout << s[i];
  }
  cout << "\n";
  return;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int qqq;
  qqq = 1;
  while (qqq--) {
    solve();
  }
  return 0;
}
