diff --git a/src/main/java/io/zipcoder/StringsAndThings.java b/src/main/java/io/zipcoder/StringsAndThings.java
index 073467a..57bb123 100644
--- a/src/main/java/io/zipcoder/StringsAndThings.java
+++ b/src/main/java/io/zipcoder/StringsAndThings.java
@@ -15,7 +15,22 @@ public class StringsAndThings {
      *           countYZ("day fyyyz"); // Should return 2
      */
     public Integer countYZ(String input){
-        return null;
+        int count = 0;
+       String[] arrayOfWords = input.split(" ");
+        for (int i = 0; i < arrayOfWords.length; i++) {
+            String word = arrayOfWords[i];
+            int numberOfCharactersInWord = word.length();
+            int lastIndex = numberOfCharactersInWord -1;
+            char lastCharacter = word.charAt(lastIndex);
+            if(lastCharacter == 'y' || lastCharacter == 'z'){
+
+                count++;
+
+            }
+            //if the last character of word is equals to y or z
+
+        }
+        return count;
     }
 
     /**
@@ -27,31 +42,68 @@ public Integer countYZ(String input){
      *           removeString("Hello there", "e") //  Should return "Hllo thr"
      *           removeString("Hello there", "x") // Should return "Hello there"
      */
+    //
+    //nested loop
+
     public String removeString(String base, String remove){
-        return null;
-    }
+       String answer = base.replaceAll(remove, "");
 
+        return answer;
+    }
+//
     /**
-     * Given a string, return true if the number of appearances of "is" anywhere in the string is equal
-     * to the number of appearances of "not" anywhere in the string (case sensitive)
+     * Given a string, return true if the number of appearances of "is" anywhere in
+     * the string is equal to the number of appearances of "not" anywhere in the string
+     * (case sensitive)
      *
      * example : containsEqualNumberOfIsAndNot("This is not")  // Should return false
      *           containsEqualNumberOfIsAndNot("This is notnot") // Should return true
      *           containsEqualNumberOfIsAndNot("noisxxnotyynotxisi") // Should return true
      */
     public Boolean containsEqualNumberOfIsAndNot(String input){
-        return null;
+        //find the number of "is" appearances
+        //find the number of "not appearances
+        //compare number of appearances
+
+        int countIs = 0;
+        int countNot = 0;
+        int indexOf = input.indexOf("not");
+        while (indexOf >= 0){
+            input = input.replaceFirst("not", " ");
+            indexOf = input.indexOf("not");
+            countNot++;
+        }
+        indexOf = input.indexOf("is");
+
+        while (indexOf >= 0){
+            input = input.replaceFirst("is" , " ");
+            indexOf = input.indexOf("is");
+            countIs++;
+        }
+
+
+        return countIs == countNot;
     }
 
     /**
-     * We'll say that a lowercase 'g' in a string is "happy" if there is another 'g' immediately to its left or right.
+     * We'll say that a lowercase 'g' in a string is "happy" if there is another
+     * 'g' immediately to its left or right.
      * Return true if all the g's in the given string are happy.
      * example : gHappy("xxggxx") // Should return  true
      *           gHappy("xxgxx") // Should return  false
      *           gHappy("xxggyygxx") // Should return  false
      */
-    public Boolean gIsHappy(String input){
-        return null;
+
+    public Boolean gIsHappy(String input) {
+       boolean returnMe = true;
+        for (int i = 0; i < input.length(); i++) {
+            if (input.charAt(i) == 'g') {
+                if (input.charAt(i + 1) != 'g' && input.charAt(i - 1) != 'g') {
+                    returnMe = false;
+                }
+            }
+        }
+        return returnMe;
     }
 
 
@@ -62,7 +114,18 @@ public Boolean gIsHappy(String input){
      *            countTriple("xxxabyyyycd") // Should return 3
      *            countTriple("a") // Should return 0
      */
+    /*
+    * identify the number of 3x repeating characters
+    * have that number of 3x repeating characters add to a counter
+    * */
     public Integer countTriple(String input){
-        return null;
+        int counter = 0;
+        for (int i = 1; i < input.length() - 1; i++){
+            if(input.charAt(i) == input.charAt(i - 1) && input.charAt(i) == input.charAt(i + 1)){
+
+               counter++;
+            }
+        }
+        return counter;
     }
 }
diff --git a/src/test/java/io/zipcoder/stringsandthings/GIsHappyTest.java b/src/test/java/io/zipcoder/stringsandthings/GIsHappyTest.java
index 020cd3d..9c150d9 100644
--- a/src/test/java/io/zipcoder/stringsandthings/GIsHappyTest.java
+++ b/src/test/java/io/zipcoder/stringsandthings/GIsHappyTest.java
@@ -33,7 +33,7 @@ public void gIsHappyTest2(){
     @Test
     public void gIsHappyTest3(){
         Boolean actual = stringsAndThings.gIsHappy("xxggyygxx");
-        Assert.assertTrue(actual);
+        Assert.assertFalse(actual);
     }
 
 }
diff --git a/target/classes/io/zipcoder/StringsAndThings.class b/target/classes/io/zipcoder/StringsAndThings.class
new file mode 100644
index 0000000..e8f02c1
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diff --git a/target/test-classes/io/zipcoder/stringsandthings/ContainsEqualNumberOfIsAndNotTest.class b/target/test-classes/io/zipcoder/stringsandthings/ContainsEqualNumberOfIsAndNotTest.class
new file mode 100644
index 0000000..556ec64
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diff --git a/target/test-classes/io/zipcoder/stringsandthings/CountTripleTest.class b/target/test-classes/io/zipcoder/stringsandthings/CountTripleTest.class
new file mode 100644
index 0000000..29d3cfe
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diff --git a/target/test-classes/io/zipcoder/stringsandthings/CountYZTest.class b/target/test-classes/io/zipcoder/stringsandthings/CountYZTest.class
new file mode 100644
index 0000000..27178e4
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diff --git a/target/test-classes/io/zipcoder/stringsandthings/GIsHappyTest.class b/target/test-classes/io/zipcoder/stringsandthings/GIsHappyTest.class
new file mode 100644
index 0000000..3bc2f6c
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diff --git a/target/test-classes/io/zipcoder/stringsandthings/RemoveStringTest.class b/target/test-classes/io/zipcoder/stringsandthings/RemoveStringTest.class
new file mode 100644
index 0000000..715f4d3
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