diff --git a/src/main/java/practice/CandidateValidator.java b/src/main/java/practice/CandidateValidator.java
index ed5b3d380..3e91f5203 100644
--- a/src/main/java/practice/CandidateValidator.java
+++ b/src/main/java/practice/CandidateValidator.java
@@ -9,10 +9,11 @@ public class CandidateValidator implements Predicate<Candidate> {
     private static final int PART_TWO = 1;
     private static final int TO_AGE = 35;
     private static final int DURATION_IN_UKRAINE = 10;
+    private static final String SEPARATOR = "-";
 
     @Override
     public boolean test(Candidate candidate) {
-        String[] splitted = candidate.getPeriodsInUkr().split("-");
+        String[] splitted = candidate.getPeriodsInUkr().split(SEPARATOR);
         int duration = Integer.parseInt(splitted[PART_TWO]) - Integer.parseInt(splitted[PART_ONE]);
         if (candidate.isAllowedToVote() && candidate.getAge() >= TO_AGE
                 && candidate.getNationality().equals(NATIONALITY)
diff --git a/src/main/java/practice/StreamPractice.java b/src/main/java/practice/StreamPractice.java
index 20830b5e3..e6e0f04c5 100644
--- a/src/main/java/practice/StreamPractice.java
+++ b/src/main/java/practice/StreamPractice.java
@@ -33,7 +33,6 @@ public int findMinEvenNumber(List<String> numbers) {
      * But before that subtract 1 from each element on an odd position (having the odd index).
      */
     public Double getOddNumsAverage(List<Integer> numbers) {
-        Double sum = (double) 0;
         return IntStream.range(0, numbers.size())
                 .map(i -> (i % 2 != 0) ? numbers.get(i) - 1 : numbers.get(i))
                 .filter(n -> n % 2 != 0)