diff --git a/sem1/test2/test2.3/main.cpp b/sem1/test2/test2.3/main.cpp
new file mode 100644
index 0000000..fc68c32
--- /dev/null
+++ b/sem1/test2/test2.3/main.cpp
@@ -0,0 +1,77 @@
+#include <iostream>
+using namespace std;
+
+void reset(bool *included);
+
+const int maxLength = 256;
+const int symbolsABC = 26;
+
+int main()
+{
+    cout << "Enter sentence: ";
+    char *sentence = new char[maxLength] {};
+    gets(sentence);
+    bool *included = new bool[symbolsABC] {};
+    int amountOfWords = 0;
+
+    int maxLengthOfWord = 0;
+    int lengthOfWord = 0;
+
+    int maxDifferentLetters = 0;
+    int differentLetters = 0;
+
+    for (int i = 0; i < maxLength; i++)
+    {
+        if (!isalpha(sentence[i]) || sentence[i] == '\0')
+        {
+            amountOfWords++;
+            for (int j = 0; j < symbolsABC; j++)
+            {
+                if (included[j])
+                {
+                    differentLetters++;
+                }
+            }
+            if (lengthOfWord > maxLengthOfWord)
+            {
+                maxLengthOfWord = lengthOfWord;
+                maxDifferentLetters = differentLetters;
+            }
+
+            if (sentence[i] == '\0')
+            {
+                break;
+            }
+            while (!isalpha(sentence[i]))
+            {
+                i++;
+            }
+            i--;
+
+            lengthOfWord = 0;
+            differentLetters = 0;
+            reset(included);
+        }
+        else
+        {
+            lengthOfWord++;
+            included[sentence[i] - 'a'] = true;
+        }
+    }
+    if (maxLengthOfWord == 0)
+    {
+        amountOfWords = 0;
+    }
+    cout << endl << "Amount of words = " << amountOfWords << endl;
+    cout << "Number of different letters in the longest word = " << maxDifferentLetters;
+    delete[] sentence;
+    delete[] included;
+}
+
+void reset(bool *included)
+{
+    for (int i = 0; i < symbolsABC; i++)
+    {
+        included[i] = false;
+    }
+}