diff --git a/2019/02/Docxument.cs b/2019/02/Docxument.cs
new file mode 100644
index 0000000..44af90e
--- /dev/null
+++ b/2019/02/Docxument.cs
@@ -0,0 +1,248 @@
+using ICSharpCode.SharpZipLib.Zip;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Security;
+using System.Text;
+
+namespace HiImRay
+{
+	public class Docxument
+	{
+		protected string Filename { get; set; }
+
+		public int CompressionLevel { get; set; } = 9;
+		public Dictionary<string, string> ReplacementWords = new Dictionary<string, string>();
+		public Dictionary<string, List<Dictionary<string, string>>> ReplacementParagraphs = new Dictionary<string, List<Dictionary<string, string>>>();
+
+		public Docxument()
+		{
+		}
+
+		public Docxument(string filename)
+		{
+			Load(filename);
+		}
+
+		public void Load(string filename)
+		{
+			this.Filename = filename;
+		}
+
+		public void Save(string saveFilename)
+		{
+			int size = 2048;
+			byte[] buffer = new byte[size];
+			int bufferSize = 0;
+
+			// read file
+			ZipEntry readEntry = null;
+			ZipInputStream readStream = new ZipInputStream(File.OpenRead(this.Filename));
+
+			// write file
+			ZipOutputStream writeStream = new ZipOutputStream(File.Create(saveFilename));
+			writeStream.SetLevel(this.CompressionLevel);						
+
+			// loop
+			while (true)
+			{
+				readEntry = readStream.GetNextEntry();
+				if (readEntry == null)
+				{
+					break;
+				}
+
+				if (string.IsNullOrWhiteSpace(readEntry.Name))
+				{
+					break;
+				}
+
+				if (!readEntry.IsFile)
+				{
+					continue;
+				}
+
+				// change document
+				if (readEntry.Name.Equals("word/document.xml"))
+				{
+					MemoryStream ms = new MemoryStream();
+					buffer = new byte[size];
+					bufferSize = 0;
+
+					do
+					{
+						bufferSize = readStream.Read(buffer, 0, buffer.Length);
+						ms.Write(buffer, 0, bufferSize);
+					} while (bufferSize > 0);
+
+					ms.Position = 0;
+
+					StreamReader sr = new StreamReader(ms);
+					StringBuilder sb = new StringBuilder();
+					sb.Append(sr.ReadToEnd());
+
+					// make changes
+					sb = replaceTokens(sb, this.ReplacementWords);
+					sb = replaceParagraphs(sb, this.ReplacementParagraphs);
+
+					// make readable
+					MemoryStream ms2 = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(sb.ToString()));
+					ms2.Position = 0;
+
+					// write new document xml
+					writeStream.PutNextEntry(new ZipEntry(readEntry.Name));
+
+					buffer = new byte[size];
+					bufferSize = 0;
+
+					do
+					{
+						bufferSize = ms2.Read(buffer, 0, buffer.Length);
+						writeStream.Write(buffer, 0, bufferSize);
+					} while (bufferSize > 0);
+
+					ms2.Close();
+					ms2.Dispose();
+				}
+				else
+				{
+					writeStream.PutNextEntry(new ZipEntry(readEntry.Name));
+
+					buffer = new byte[size];
+					bufferSize = 0;
+
+					do
+					{
+						bufferSize = readStream.Read(buffer, 0, buffer.Length);
+						writeStream.Write(buffer, 0, bufferSize);
+					} while (bufferSize > 0);
+				}
+			}
+						
+			writeStream.Finish();
+			writeStream.Flush();
+			writeStream.Close();
+			writeStream.Dispose();
+
+			readStream.Close();
+			readStream.Dispose();
+		}
+
+		protected StringBuilder replaceTokens(StringBuilder sb, Dictionary<string, string> options)
+		{
+			foreach (KeyValuePair<string, string> item in options)
+			{
+				sb.Replace("{{" + item.Key + "}}", SecurityElement.Escape(item.Value));
+			}
+
+			return sb;
+		}
+
+		protected StringBuilder replaceParagraphs(StringBuilder sb, Dictionary<string, List<Dictionary<string, string>>> options)
+		{
+			foreach (KeyValuePair<string, List<Dictionary<string, string>>> item in options)
+			{
+				sb = replaceParagraph(sb, item);
+			}
+
+			return sb;
+		}
+	
+		protected StringBuilder replaceParagraph(StringBuilder sb, KeyValuePair<string, List<Dictionary<string, string>>> options)
+		{		
+			string paragraph = sb.ToString();
+
+			Tuple<int, int> outerCoord = getOuterParagraph(paragraph, "{{" + options.Key + "}}");
+			if (outerCoord != null)
+			{
+				sb.Remove(outerCoord.Item1, outerCoord.Item2);
+
+				Tuple<int, int> innerCoord = getInnerParagraph(paragraph.Substring(outerCoord.Item1, outerCoord.Item2), "{{" + options.Key + "}}");
+				string innerParagraph = paragraph.Substring((innerCoord.Item1 + outerCoord.Item1), innerCoord.Item2);
+
+				StringBuilder innerText = new StringBuilder();
+				foreach (Dictionary<string, string> row in options.Value)
+				{
+					StringBuilder sb2 = new StringBuilder();
+					sb2.Append(innerParagraph);
+
+					sb2 = replaceTokens(sb2, row);
+
+					innerText.Append(sb2.ToString());
+				}
+
+				sb.Insert(outerCoord.Item1, innerText.ToString());
+			}
+
+			return sb;
+		}
+
+		protected Tuple<int, int> getOuterParagraph(string fullText, string findTerm)
+		{
+			string headTerm = "<w:p ";
+			string tailTerm = "</w:p>";
+
+			int headIndex = fullText.IndexOf(findTerm);
+			if (headIndex < 0)
+			{
+				return null;
+			}
+
+			int tailIndex = fullText.IndexOf(findTerm, (headIndex + findTerm.Length));
+			if (tailIndex < 0)
+			{
+				return null;
+			}
+
+			headIndex = fullText.LastIndexOf(headTerm, headIndex);
+			if (headIndex < 0)
+			{
+				return null;
+			}
+
+			tailIndex = fullText.IndexOf(tailTerm, (tailIndex + tailTerm.Length));
+			if (tailIndex < 0)
+			{
+				return null;
+			}
+
+			tailIndex += tailTerm.Length;
+
+			return new Tuple<int, int>(headIndex, (tailIndex - headIndex));
+		}
+
+		protected Tuple<int, int> getInnerParagraph(string fullText, string findTerm)
+		{
+			string headTerm = "<w:p ";
+			string tailTerm = "</w:p>";
+
+			int headIndex = fullText.IndexOf(findTerm);
+			if (headIndex < 0)
+			{
+				return null;
+			}
+
+			int tailIndex = fullText.IndexOf(findTerm, (headIndex + findTerm.Length));
+			if (tailIndex < 0)
+			{
+				return null;
+			}
+
+			headIndex = fullText.IndexOf(tailTerm, headIndex);
+			if (headIndex < 0)
+			{
+				return null;
+			}
+
+			headIndex += tailTerm.Length;
+
+			tailIndex = fullText.LastIndexOf(headTerm, tailIndex);
+			if (tailIndex < 0)
+			{
+				return null;
+			}
+
+			return new Tuple<int, int>(headIndex, (tailIndex - headIndex));
+		}
+	}
+}