diff --git a/programmers/전화번호 목록/solution.java b/programmers/전화번호 목록/solution.java
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index 0000000..59ba6f8
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+++ b/programmers/전화번호 목록/solution.java	
@@ -0,0 +1,21 @@
+// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/42577
+
+import java.util.Arrays;
+class Solution {
+    public boolean solution(String[] pb) {
+        boolean answer = true;
+        Arrays.sort(pb);
+        for(int a = 0; a < pb.length; a++){
+            for(int b = a+1; b < a+2; b++){
+                if(pb[b%pb.length].replaceAll(pb[a],"s").matches("^s.+")){
+                    answer = false;
+                    break;
+                }
+            }
+            if(answer == false){
+                break;
+            }
+        }
+        return answer;
+    }
+}
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