diff --git a/cv1/program.c b/cv1/program.c
index 137c79e..42d52bb 100644
--- a/cv1/program.c
+++ b/cv1/program.c
@@ -5,19 +5,22 @@ int main() {
     int lines_count = 0;
 
     while ((text = getchar()) != EOF) {
-        if (text >= 'a' && text <= 'z') {
-            text = text - 'a' + 'A';
-        } else if (text >= 'A' && text <= 'Z') {
-            text = text - 'A' + 'a';
-        } else if (text == '\n') {
+        if (text == '\n') {
+            putchar('\n');
             lines_count++;
-        } else if (text < 32 || text == 127) {
+        } else if (text == '\t') {
+            putchar('\t');
+            continue;
+        } else if ((text >= 'a' && text <= 'z') || (text >= 'A' && text <= 'Z')) {
+            putchar(text ^ ' ');
+        } else if ((text >= 32 && text < 127) || text == 9) {
+            putchar(text);
+        } else {
             continue;
         }
-
-        putchar(text);
     }
 
     printf("\nLines count: %d\n", lines_count);
+
     return 0;
-}
+}
\ No newline at end of file