diff --git a/donggi/java/src/main/java/org/example/feb/Boj20310.java b/donggi/java/src/main/java/org/example/feb/Boj20310.java
new file mode 100644
index 0000000..3f0b8e8
--- /dev/null
+++ b/donggi/java/src/main/java/org/example/feb/Boj20310.java
@@ -0,0 +1,23 @@
+package org.example.feb;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class Boj20310 {
+    StringBuilder sb = new StringBuilder();
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        String str = br.readLine();
+
+        Boj20310 s = new Boj20310();
+        System.out.println(s.solution(str));
+    }
+
+    public String solution(String str) {
+        String[] split = str.split("");
+
+        return sb.toString();
+    }
+}