diff --git a/TaskB06/run.py b/TaskB06/run.py
index 399c40b..ed233b6 100644
--- a/TaskB06/run.py
+++ b/TaskB06/run.py
@@ -1,8 +1,6 @@
-import string
 import sys
 import csv
 import os
-from more_itertools import difference
 
 from numpy import append
 
@@ -26,6 +24,7 @@ with open(join_path(sys.argv[1]), "r", newline="", encoding="utf8") as csvfile:
     accepting_state = int(fsa_description[-1][0])
     fsa_description = fsa_description[:-1]
     fsa_description_map = {}
+    is_error = False
     for num, item in enumerate(fsa_description):
         for letter in item[2]:
             if letter not in alfabet:
@@ -33,10 +32,13 @@ with open(join_path(sys.argv[1]), "r", newline="", encoding="utf8") as csvfile:
                 exit(-1)
             if (int(item[0]), letter) in fsa_description_map:
                 print("ERROR - duplicate letter:", letter, "| line:", num + 1)
-                exit(-1)
+                is_error = True
             tuple = (int(item[0]), letter)
             fsa_description_map[tuple] = int(item[1])
 
+    if is_error:
+        exit(-1)
+
 states = {}
 for item in fsa_description_map:
     states[item[0]] = states[item[0]] + item[1] if item[0] in states else item[1]
@@ -75,7 +77,7 @@ with open(join_path(sys.argv[3]), "r", newline="", encoding="utf8") as csvfile:
     test_out = list(filereader)
 
 
-difference = []
+is_difference = []
 for i, word in enumerate(test_in):
     current_state = 0
     if len(word) != 0:
@@ -87,12 +89,13 @@ for i, word in enumerate(test_in):
         print("YES\t", end="")
         if "YES" != test_out[i][0]:
             print("ERROR", word, end="")
-            difference.append(i)
+            is_difference.append(i)
     else:
         print("NO\t", end="")
         if "NO" != test_out[i][0]:
             print("ERROR", word, end="")
-            difference.append(i)
+            is_difference.append(i)
     print()
 
-print(difference)
+if len(is_difference) != 0:
+    print(is_difference)
diff --git a/TaskB07/run.py b/TaskB07/run.py
index b4c899e..871f28c 100644
--- a/TaskB07/run.py
+++ b/TaskB07/run.py
@@ -1,9 +1,6 @@
-from re import T
-import string
 import sys
 import csv
 import os
-from more_itertools import difference
 
 from numpy import append
 
@@ -80,7 +77,7 @@ with open(join_path(sys.argv[3]), "r", newline="", encoding="utf8") as csvfile:
     test_out = list(filereader)
 
 
-difference = []
+is_difference = []
 for i, word in enumerate(test_in):
     current_state = 0
     if len(word) != 0:
@@ -92,12 +89,13 @@ for i, word in enumerate(test_in):
         print("YES\t", end="")
         if "YES" != test_out[i][0]:
             print("ERROR", word, end="")
-            difference.append(i)
+            is_difference.append(i)
     else:
         print("NO\t", end="")
         if "NO" != test_out[i][0]:
             print("ERROR", word, end="")
-            difference.append(i)
+            is_difference.append(i)
     print()
 
-print(difference)
+if len(is_difference) != 0:
+    print(is_difference)