diff --git a/Lab4.FirstEqualLast/TaskUtils.cs b/Lab4.FirstEqualLast/TaskUtils.cs
index af0fe1d..87945c6 100644
--- a/Lab4.FirstEqualLast/TaskUtils.cs
+++ b/Lab4.FirstEqualLast/TaskUtils.cs
@@ -27,7 +27,7 @@ namespace Lab4.FirstEqualLast
 			@param punctuation – punctuation marks to separate words */
 		private static int FirstEqualLast (string line, string punctuation)
 		{
-			string[] parts = Regex.Split(line, punctuation);
+			string[] parts = Regex.Split(line.ToLower(), punctuation);
 			int equal = 0;
 			foreach (string word in parts)
 				if(word.Length > 0) // empty words at the end of line
@@ -56,8 +56,7 @@ namespace Lab4.FirstEqualLast
 			@param punctuation – punctuation marks to separate words */
 		private static int FirstEqualLast (string line, char[] punctuation)
 		{
-			string[] parts = line.Split(punctuation,
-			StringSplitOptions.RemoveEmptyEntries);
+			string[] parts = line.ToLower().Split(punctuation, StringSplitOptions.RemoveEmptyEntries);
 			int equal = 0;
 			foreach (string word in parts)
 				if (word[0] == word[word.Length - 1])
diff --git a/Lab4.RemoveComments/Program.cs b/Lab4.RemoveComments/Program.cs
index 5e8d41e..f789a14 100644
--- a/Lab4.RemoveComments/Program.cs
+++ b/Lab4.RemoveComments/Program.cs
@@ -1,4 +1,5 @@
-using System;
+using System;
+using System.Text.RegularExpressions;
 
 namespace Lab4.RemoveComments
 {