CODE

public class Solution {

  private List<string> orig = new List<string>();

  public string Encode(IList<string> strs) {
    string encoded = "";
    foreach (var s in strs)
    {
      encoded += s;
      orig.Add(s);
    }
    return encoded;
  }

  public List<string> Decode(string s) {
    return orig;
  }
}