diff --git a/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cpp b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cpp
new file mode 100644
index 0000000..27c7000
--- /dev/null
+++ b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cpp
@@ -0,0 +1,27 @@
+class Solution {
+public:
+    int markCharacters(string &word) {
+        int marked = 0;
+        
+        for (char ch : word) {
+            int position = ch - 'a';
+            marked |= 1 << position;
+        }
+        
+        return marked;
+    }
+        
+    int countConsistentStrings(string allowed, vector<string>& words) {
+        int markedAllowed = markCharacters(allowed);
+        int answer = 0;
+        
+        for (string word : words) {
+            int markedWord = markCharacters(word);
+            
+            if ((markedWord & markedAllowed) == markedWord)
+                answer++;
+        }
+        
+        return answer;
+    }
+};
\ No newline at end of file
diff --git a/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cs b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cs
new file mode 100644
index 0000000..664303c
--- /dev/null
+++ b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.cs
@@ -0,0 +1,26 @@
+public class Solution {
+    public int MarkCharacters(String word) {
+        int marked = 0;
+        
+        foreach (char ch in word.ToCharArray()) {
+            int position = ch - 'a';
+            marked |= 1 << position;
+        }
+        
+        return marked;
+    }
+    
+    public int CountConsistentStrings(string allowed, string[] words) {
+        int markedAllowed = MarkCharacters(allowed);
+        int answer = 0;
+        
+        foreach (String word in words) {
+            int markedWord = MarkCharacters(word);
+            
+            if ((markedWord & markedAllowed) == markedWord)
+                answer++;
+        }
+        
+        return answer;
+    }
+}
\ No newline at end of file
diff --git a/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.java b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.java
new file mode 100644
index 0000000..753b3ee
--- /dev/null
+++ b/Algorithms/Easy/1684_CountTheNumberOfConsistentStrings/Solution.java
@@ -0,0 +1,26 @@
+class Solution {
+    public int markCharacters(String word) {
+        int marked = 0;
+        
+        for (char ch : word.toCharArray()) {
+            int position = Character.getNumericValue(ch);
+            marked |= 1 << position;
+        }
+        
+        return marked;
+    }
+    
+    public int countConsistentStrings(String allowed, String[] words) {
+        int markedAllowed = markCharacters(allowed);
+        int answer = 0;
+        
+        for (String word : words) {
+            int markedWord = markCharacters(word);
+            
+            if ((markedWord & markedAllowed) == markedWord)
+                answer++;
+        }
+        
+        return answer;
+    }
+}
\ No newline at end of file