diff --git a/src/_12_Закревський_Данило_Сергійович/lab5/FifthLab.java b/src/_12_Закревський_Данило_Сергійович/lab5/FifthLab.java
new file mode 100644
index 0000000..702beeb
--- /dev/null
+++ b/src/_12_Закревський_Данило_Сергійович/lab5/FifthLab.java
@@ -0,0 +1,139 @@
+import java.util.Scanner;
+
+public class FifthLab {
+
+    public static void main(String[] args) {
+        Scanner scn = new Scanner(System.in);
+        System.out.println("Enter a string: ");
+        String text = scn.nextLine();
+        StringBuilder textBuilder = new StringBuilder(text);
+        StringBuilder result = new StringBuilder();
+
+        System.out.print("Enter a string to replace the words: ");
+        String replace = scn.nextLine();
+        System.out.print("Enter the length of the words to replace: ");
+        int length = scn.nextInt();
+        
+        System.out.println("\nText before changes: ");
+        System.out.println(textBuilder);
+
+
+        String[] mySentence = textBuilder.toString().split("(?<=[!.?])\\s?");
+        for(String s: mySentence) {
+            StringBuilder sb = new StringBuilder(s);
+            Sentence sentence = new Sentence(sb, length, replace);
+            result.append(sentence.wordsSplit());
+        }
+
+        System.out.println("\nText after changes: ");
+        System.out.println(result);
+        scn.close();
+    }  
+}
+
+class Sentence {
+    
+    private final StringBuilder sentence;
+    private final int length;
+    private final String replace;
+
+    public Sentence(StringBuilder sentence, int length, String replace) {
+        this.sentence = sentence;
+        this.length = length;
+        this.replace = replace;
+    }
+
+    public StringBuilder wordsSplit() {
+        StringBuilder ReturnSentence = new StringBuilder();
+        String text = sentence.toString();
+        String[] words = text.split(" ");
+        for(String s: words) {
+            StringBuilder sb = new StringBuilder(s);
+            Word word = new Word(sb, length, replace);
+            ReturnSentence.append(word.lettersSplit()).append(" ");
+        }
+
+        return ReturnSentence;
+    }
+}
+
+class Word {
+
+    private final StringBuilder word;
+    private final int length;
+    private final String replace;
+
+    public Word(StringBuilder word, int length, String replace) {
+        this.word = word;
+        this.length = length;
+        this.replace = replace;
+    }
+
+    public StringBuilder lettersSplit() {
+        StringBuilder ReturnWord = new StringBuilder();
+        String wordstr = word.toString();
+        int len = wordstr.length();
+        String[] letters = wordstr.split("");
+        String[] ReplaceLetters = replace.split("");
+        char last = wordstr.charAt(word.length() - 1);
+        if(last == '!' || last == '?' || last == '.') {
+            if(wordstr.charAt(word.length() - 2) == '.') {
+                len = wordstr.length() - 3;
+            } else {
+                len = wordstr.length() - 1;
+            }
+        }
+        if(len == length) {
+            for(String chr: ReplaceLetters) {
+                StringBuilder ltr = new StringBuilder(chr);
+                Letter letter = new Letter(ltr);
+                ReturnWord.append(letter.getLetter());
+            }
+            if(wordstr.length() - len == 1) {
+                ReturnWord.append(wordstr.charAt(wordstr.length() - 1));
+            } else if(wordstr.length() - len == 3) {
+                ReturnWord.append("...");
+            }
+        } else {
+            for(String chr: letters) {
+                StringBuilder ltr = new StringBuilder(chr);
+                if(chr.equals("!") || chr.equals("?") || chr.equals(".") || chr.equals(",") || chr.equals(":") || chr.equals(";")) {
+                    Punctuation punctuation = new Punctuation(ltr);
+                    ReturnWord.append(punctuation.getPunctuation());
+                } else {
+                    Letter letter = new Letter(ltr);
+                    ReturnWord.append(letter.getLetter());
+                }
+            }
+        }
+        
+        return ReturnWord;
+    }
+}
+
+class Letter {
+
+    private final StringBuilder letter;
+
+    public Letter(StringBuilder letter) {
+        this.letter = letter;
+    }
+
+    public StringBuilder getLetter() {
+        return letter;
+    }
+
+}
+
+class Punctuation {
+
+    private final StringBuilder punctuation;
+
+    public Punctuation(StringBuilder punctuation) {
+        this.punctuation = punctuation;
+    }
+
+    public StringBuilder getPunctuation() {
+        return punctuation;
+    }
+}