diff --git "a/khj20006/202502/20 SWEA D4 \353\217\231\354\225\204\353\246\254\354\213\244 \352\264\200\353\246\254\355\225\230\352\270\260.md" "b/khj20006/202502/20 SWEA D4 \353\217\231\354\225\204\353\246\254\354\213\244 \352\264\200\353\246\254\355\225\230\352\270\260.md"
new file mode 100644
index 00000000..1285bc95
--- /dev/null
+++ "b/khj20006/202502/20 SWEA D4 \353\217\231\354\225\204\353\246\254\354\213\244 \352\264\200\353\246\254\355\225\230\352\270\260.md"	
@@ -0,0 +1,89 @@
+```java
+
+import java.util.*;
+import java.io.*;
+
+
+class Solution {
+	
+	// IO field
+	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+	static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
+	static StringTokenizer st;
+
+	static void nextLine() throws Exception {st = new StringTokenizer(br.readLine());}
+	static int nextInt() {return Integer.parseInt(st.nextToken());}
+	static long nextLong() {return Long.parseLong(st.nextToken());}
+	static void bwEnd() throws Exception {bw.flush();bw.close();}
+	
+	// Additional field
+	static int[] A;
+	static int[] dp;
+	static int N;
+	static final int mod = (int)1e9 + 7;
+	
+	public static void main(String[] args) throws Exception {
+		
+		int TC;
+		TC = Integer.parseInt(br.readLine());
+		ready(TC);
+	
+		bwEnd();
+		
+	}
+	
+	static void ready(int TC) throws Exception{
+
+		for(int tc=1;tc<=TC;tc++) {
+
+			// Write Code
+
+			char[] temp = br.readLine().toCharArray();
+			N = temp.length;
+			A = new int[N+1];
+			for(int i=1;i<=N;i++) A[i] = temp[i-1]-'A';
+			dp = new int[16];
+			
+			//
+			
+			solve(tc);
+			
+		}
+		
+	}
+	
+	static void solve(int tc) throws Exception{
+
+		// Solve part
+		for(int x=0;x<16;x++) if((x&1) != 0 && (x&(1<<A[1])) != 0) dp[x] = 1;
+		for(int i=2;i<=N;i++) {
+			int[] ndp = new int[16];
+			for(int x=0;x<16;x++) if((x&(1<<A[i])) != 0) {
+				for(int y=0;y<16;y++) if((x & y) != 0) {
+					ndp[x] += dp[y];
+					ndp[x] %= mod;
+				}
+			}
+			dp = ndp;
+		}
+		
+		int ans = 0;
+		for(int i=0;i<16;i++) ans = (ans + dp[i]) % mod;
+		
+		//
+		
+		bw.write("#" + tc + " ");
+		
+		// Output part
+		
+		bw.write(ans + "\n");
+		
+		//
+		
+	}
+
+
+	
+}
+
+```