You are given two integers n and k.

Your task is to construct such a string s of length n that for each i from 1 to k there is at least one i-th letter of the Latin alphabet in this string (the first letter is 'a', the second is 'b' and so on) and there are no other letters except these. You have to maximize the minimal frequency of some letter (the frequency of a letter is the number of occurrences of this letter in a string). If there are several possible answers, you can print any.

You have to answer t independent queries.

Input

The first line of the input contains one integer t (1 ≤ t ≤ 100) — the number of queries.

The next t lines are contain queries, one per line. The i-th line contains two integers n_i and k_i (1 ≤ n_i ≤ 100, 1 ≤ k_i ≤ min(n_i, 26)) — the length of the string in the i-th query and the number of characters in the i-th query.

Output

Print t lines. In the i-th line print the answer to the i-th query: any string s_i satisfying the conditions in the problem statement with constraints from the i-th query.

Example

Input


3
7 3
4 4
6 2


Output


cbcacab
abcd
baabab

Note

In the first example query the maximum possible minimal frequency is 2, it can be easily seen that the better answer doesn't exist. Other examples of correct answers: "cbcabba", "ccbbaaa" (any permutation of given answers is also correct).

In the second example query any permutation of first four letters is acceptable (the maximum minimal frequency is 1).

In the third example query any permutation of the given answer is acceptable (the maximum minimal frequency is 3).
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.awt.Point;

 
public class TryB
{
    
    static class InputReader {
 
		private final InputStream stream;
		private final byte[] buf = new byte[8192];
		private int curChar, snumChars;
 
		public InputReader(InputStream st) {
			this.stream = st;
		}
 
		public int read() {
			if (snumChars == -1)
	 			throw new InputMismatchException();
			if (curChar >= snumChars) {
				curChar = 0;
				try {
					snumChars = stream.read(buf);
				} catch (IOException e) {
					throw new InputMismatchException();
				}
				if (snumChars <= 0)
					return -1;
			}
			return buf[curChar++];
		}
 
		public int ni() {
			int c = read();
			while (isSpaceChar(c)) {
				c = read();
			}
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			int res = 0;
			do {
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			return res * sgn;
		}
 
		public long nl() {
			int c = read();
			while (isSpaceChar(c)) {
				c = read();
			}
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			long res = 0;
			do {
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			return res * sgn;
		}
 
		public int[] nia(int n) {
			int a[] = new int[n];
			for (int i = 0; i < n; i++) {
				a[i] = ni();
			}
			return a;
		}
 
		public String rs() {
			int c = read();
			while (isSpaceChar(c)) {
				c = read();
			}
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isSpaceChar(c));
			return res.toString();
		}
 
		public String nextLine() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuilder res = new StringBuilder();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isEndOfLine(c));
			return res.toString();
		}
 
		public boolean isSpaceChar(int c) {
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}
 
		private boolean isEndOfLine(int c) {
			return c == '\n' || c == '\r' || c == -1;
		}
 
	}
	

	
	
	
   
		static PrintWriter w = new PrintWriter(System.out);
 static char [][]sol;
    public static void main(String[] args)
    {
        
        InputReader sc = new InputReader(System.in);
        //PrintWriter w = new PrintWriter(System.out);
    
       /* 
        prime  = new boolean[n + 1];
		sieve();
		prime[1] = false;
		*/
		/*
		as = new ArrayList<>();
		for(int i=2;i<=1000000;i++)
		{
		    if(prime[i])
		    as.add(i);
		}
		*/
		
       /* 
		
	long a = sc.nl();
	 
            BigInteger ans = new BigInteger("1");
            for (long i = 1; i < Math.sqrt(a); i++) {
                if (a % i == 0) {
                    if (a / i == i) {
                        ans = ans.multiply(BigInteger.valueOf(phi(i)));
                        
                    } else {
                        ans = ans.multiply(BigInteger.valueOf(phi(i)));
                        ans = ans.multiply(BigInteger.valueOf(phi(a / i)));
 
                        
                    }
 
 
                }
            }
            w.println(ans.mod(bigInteger));
            */
          
         // MergeSort ob = new MergeSort();
       // ob.sort(arr, 0, arr.length-1);
       
    // Student []st = new Student[x];    
   // st[i] = new Student(i,d[i]);
     //Arrays.sort(st,(p,q)->p.diff-q.diff);
 
  
  // w.println(b[2]);   
  int t = sc.ni();
  while(t-- > 0)
  {
      int x = sc.ni();
      int k = sc.ni();
      int p = x/k;
      int q = x%k;
     StringBuilder sb = new StringBuilder("");
     
     for(int i=0;i<q;i++)
     {
         w.print((char)(i+97));
     }
     for(int i=0;i<p;i++)
     {
         for(int j=0;j<k;j++)
         {
             w.print((char) (j +97));
         }
     }
     
     w.println();
  }
  

      
   
     w.close();
        
  
    
    }
    
    static boolean checkT(int a,int b, int c)
    {
        int f = 0;
        if(a+b <= c || b+c <=a||a+c <= b)
            return false;
        else
            return true;
    }
    static double costheta(int a,int b,int c)
    {
        double pos = ((double)b*(double)b + (double)c*(double)c-(double)a*(double)a) / (2*(double)b*(double)c);
         return pos;
    }
     public static int ip(String s){
		return Integer.parseInt(s);
	}
	 public static String ips(int s){
		return Integer.toString(s);
	}
         static long area(int ax,int ay,int bx,int by,int cx,int cy)
         {
             long ar = ((long)ax*((long)by-(long)cy)) + ((long)bx*((long)cy-(long)ay)) + ((long)cx*((long)ay-(long)by));
             return Math.abs(ar);
         }
         public static int lowerBound(Student[] array, int length, int value) {
        int low = 0;
        int high = length-1;
        while (low < high) {
            final int mid = (low + high) / 2;
            if (value <= array[mid].val) {
                high = mid;
            } else {
                low = mid + 1;
            }
        }
        return low;
  }
  public static int upperBound(int[] array, int length, int value) {
        int low = 0;
        int high = length-1;
        while (low < high) {
            final int mid = (low + high) / 2;
            if (value >= array[mid]) {
                low = mid + 1;
            } else {
                high = mid;
            }
        }
        return low;
    }
   static class Student
    {
        
        int val;
        int index;
        Student(int val,int index)
        {
            this.val = val;
            this.index = index;
            
            
        }
        
    }
}