#include <bits/stdc++.h>

int main() {
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  int N; std::string S; std::cin >> N >> S;
  if (N % 2) {
    std::cout << "No\n";
  } else {
    std::cout << "Yes\n";
    for (int i = 0; i < N; i += 2) {
      std::cout << S[i] << (i + 2 == N ? " " : "");
    }
    for (int i = 1; i < N; i += 2) {
      std::cout << S[i] << (i + 1 == N ? "\n" : "");
    }
  }
}