diff --git a/clean-code-challanges/src/main/java/IsogramChecker.java b/clean-code-challanges/src/main/java/IsogramChecker.java
index 00d4c74..0ea8a5b 100644
--- a/clean-code-challanges/src/main/java/IsogramChecker.java
+++ b/clean-code-challanges/src/main/java/IsogramChecker.java
@@ -1,3 +1,5 @@
+import java.util.stream.Collectors;
+
 /**
  * Determine if a word or phrase is an isogram.
  *
@@ -16,7 +18,16 @@
 class IsogramChecker {
 
   boolean isIsogram(String phrase) {
-    throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
+    final String whiteSpacesAndHyphens = "[\\s\\-]";
+
+    String cleanPhrase = phrase.replaceAll(whiteSpacesAndHyphens, "").toLowerCase();
+
+    int numberOfUniqueCharacters = cleanPhrase.chars()
+      .mapToObj(o -> (char)o)
+      .collect(Collectors.toSet())
+      .size();
+
+    return cleanPhrase.length() == numberOfUniqueCharacters;
   }
 
 }
diff --git a/clean-code-challanges/src/test/java/IsogramCheckerTest.java b/clean-code-challanges/src/test/java/IsogramCheckerTest.java
index e6808f9..188d4fd 100644
--- a/clean-code-challanges/src/test/java/IsogramCheckerTest.java
+++ b/clean-code-challanges/src/test/java/IsogramCheckerTest.java
@@ -4,7 +4,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-@Ignore
+
 public class IsogramCheckerTest {
 
   @Test
diff --git a/clean-code-challanges/src/test/java/PigLatinTranslatorTest.java b/clean-code-challanges/src/test/java/PigLatinTranslatorTest.java
index c26cdcd..ff760f5 100644
--- a/clean-code-challanges/src/test/java/PigLatinTranslatorTest.java
+++ b/clean-code-challanges/src/test/java/PigLatinTranslatorTest.java
@@ -1,3 +1,4 @@
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
@@ -6,8 +7,8 @@
 import java.util.Collection;
 
 import static org.junit.Assert.assertEquals;
-
 @RunWith(Parameterized.class)
+@Ignore
 public class PigLatinTranslatorTest {
 
   private String englishPhrase;