diff --git a/kyu_4/range_extraction/solution.py b/kyu_4/range_extraction/solution.py
index 8db916961bd..fe5bfdb3e06 100644
--- a/kyu_4/range_extraction/solution.py
+++ b/kyu_4/range_extraction/solution.py
@@ -22,10 +22,11 @@ def solution(args: list) -> str:
             continue
 
         # case 2
-        result = case_2(a, i, current, result)
+        result = case_2(a=a, i=i, current=current, result=result)
 
         # case 3
-        result = case_3(args, a, i, current, result)
+        if i == len(args) - 1 and not current[2]:
+            result = case_3(args=args, a=a, i=i, current=current, result=result)
 
         # case 4
         if i == len(args) - 1 and current[-1] != a and current[2]:
@@ -44,20 +45,19 @@ def case_3(args: list, a: int, i: int, current: list, result: str) -> str:
     :param result:
     :return:
     """
-    if i == len(args) - 1 and not current[2]:
-        if current[1] + 1 == a:
-            current[1] = a
+    if current[1] + 1 == a:
+        current[1] = a
 
-        result += str(current[0])
-        if abs(current[1] - current[0]) >= 2:
-            result += '-' + str(current[1])
-        elif current[0] != current[1]:
-            result += ',' + str(current[1])
+    result += str(current[0])
+    if abs(current[1] - current[0]) >= 2:
+        result += '-' + str(current[1])
+    elif current[0] != current[1]:
+        result += ',' + str(current[1])
 
     return result
 
 
-def case_2(a: int, i: int, current: list, result: str) -> str:
+def case_2(**kwargs) -> str:
     """
     Case #2
     :param i:
@@ -66,6 +66,12 @@ def case_2(a: int, i: int, current: list, result: str) -> str:
     :param result:
     :return:
     """
+
+    a: int = kwargs['a']
+    i: int = kwargs['i']
+    current: list = kwargs['current']
+    result: str = kwargs['result']
+
     if a == current[1] + 1:
         current[1] = a
         current[2] = False