Kawashiro Nitori is a girl who loves competitive programming.

One day she found a string and an integer. As an advanced problem setter, she quickly thought of a problem.

Given a string s and a parameter k, you need to check if there exist k+1 non-empty strings a_1,a_2...,a_{k+1}, such that $$$s=a_1+a_2+… +a_k+a_{k+1}+R(a_k)+R(a_{k-1})+…+R(a_{1}).$$$ 

Here + represents concatenation. We define R(x) as a reversed string x. For example R(abcd) = dcba. Note that in the formula above the part R(a_{k+1}) is intentionally skipped.

Input

The input consists of multiple test cases. The first line contains a single integer t (1≤ t≤ 100) — the number of test cases. The description of the test cases follows.

The first line of each test case description contains two integers n, k (1≤ n≤ 100, 0≤ k≤ ⌊ n/2 ⌋) — the length of the string s and the parameter k.

The second line of each test case description contains a single string s of length n, consisting of lowercase English letters.

Output

For each test case, print "YES" (without quotes), if it is possible to find a_1,a_2,…,a_{k+1}, and "NO" (without quotes) otherwise.

You can print letters in any case (upper or lower).

Example

Input


7
5 1
qwqwq
2 1
ab
3 1
ioi
4 2
icpc
22 0
dokidokiliteratureclub
19 8
imteamshanghaialice
6 3
aaaaaa


Output


YES
NO
YES
NO
YES
NO
NO

Note

In the first test case, one possible solution is a_1=qw and a_2=q.

In the third test case, one possible solution is a_1=i and a_2=o.

In the fifth test case, one possible solution is a_1=dokidokiliteratureclub.
import java.util.*;
import java.io.*;

public class B {
	public static void main(String[] args) {
		FastScanner sc = new FastScanner();
		FastOutput out = new FastOutput(System.out);
		int t = sc.nextInt();
		while (t-- > 0) {
			int n = sc.nextInt();
			int k=sc.nextInt();
			char c[]=sc.next().toCharArray();
			boolean ok=true;
			if(n<=2*k){
				ok=false;
			}else{
				for(int i=0;i<k;i++){
					if(c[i]!=c[n-i-1])ok=false;
				}
			}
			if(ok){
				out.println("YES");
			}else{
				out.println("NO");
			}
		}
		out.close();
	}

	static class FastScanner {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer("");

		String next() {
			while (!st.hasMoreTokens())
				try {
					st = new StringTokenizer(br.readLine());
				} catch (IOException e) {
					e.printStackTrace();
				}
			return st.nextToken();
		}

		int nextInt() {
			return Integer.parseInt(next());
		}

		int[] readIntArray(int n) {
			int[] a = new int[n];
			for (int i = 0; i < n; i++)
				a[i] = nextInt();
			return a;
		}

		long[] readLongArray(int n) {
			long[] a = new long[n];
			for (int i = 0; i < n; i++)
				a[i] = nextLong();
			return a;
		}

		long nextLong() {
			return Long.parseLong(next());
		}
	}

	static class FastOutput implements AutoCloseable, Closeable, Appendable {
		private static final int THRESHOLD = 1 << 13;
		private final Writer os;
		private StringBuilder cache = new StringBuilder(THRESHOLD * 2);

		public FastOutput append(CharSequence csq) {
			cache.append(csq);
			return this;
		}

		public FastOutput append(CharSequence csq, int start, int end) {
			cache.append(csq, start, end);
			return this;
		}

		private void afterWrite() {
			if (cache.length() < THRESHOLD) {
				return;
			}
			flush();
		}

		public FastOutput(Writer os) {
			this.os = os;
		}

		public FastOutput(OutputStream os) {
			this(new OutputStreamWriter(os));
		}

		public FastOutput append(char c) {
			cache.append(c);
			afterWrite();
			return this;
		}

		public FastOutput append(int c) {
			cache.append(c);
			afterWrite();
			return this;
		}

		public FastOutput append(String c) {
			cache.append(c);
			afterWrite();
			return this;
		}

		public FastOutput println(String c) {
			return append(c).println();
		}

		public FastOutput println() {
			return append(System.lineSeparator());
		}

		public FastOutput flush() {
			try {
				os.append(cache);
				os.flush();
				cache.setLength(0);
			} catch (IOException e) {
				throw new UncheckedIOException(e);
			}
			return this;
		}

		public void close() {
			flush();
			try {
				os.close();
			} catch (IOException e) {
				throw new UncheckedIOException(e);
			}
		}

		public String toString() {
			return cache.toString();
		}
	}
}

	 		 							    		  	  			 				