#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  while (cin >> n) {
    string s;
    cin >> s;
    int one = 0;
    int zero = 0;
    for (int i = 0; i < n; i++) {
      if (s[i] == '1')
        one++;
      else
        zero++;
    }
    if (one != zero) {
      cout << 1 << endl;
      cout << s << endl;
    } else if (one == zero) {
      cout << 2 << endl;
      cout << s[0] << " ";
      for (int i = 1; i < n; i++) {
        cout << s[i];
      }
      cout << endl;
    }
  }
}
