Problem: Mr. Tanaka died leaving the orchard of HW Earl. The orchard is divided into H x W plots in the north, south, east, and west directions, and apples, oysters, and oranges are planted in each plot. Mr. Tanaka left such a will.

Divide the orchard into as many relatives as possible on a parcel basis. However, if the same kind of fruit is planted in a plot that is located in either the north, south, east, or west direction of a plot, treat them as one large plot because the boundaries of the plot are unknown.

For example, in the following 3 × 10 section ('li' represents an apple,'ka' represents an oyster, and'mi' represents a mandarin orange)

<image>


Eliminating the boundaries between plots with the same tree gives:

<image>


In the end, it will be divided into 10 compartments, or 10 people.

The distribution must be completed before it snows and the boundaries of the plot disappear. Your job is to determine the number of plots to distribute based on the map of the orchard.

Create a program that reads the map of the orchard and outputs the number of relatives who can receive the distribution.



Input

Given multiple datasets. Each dataset is given a string of H lines consisting of the characters H x W, starting with a line containing H, W (H, W ≤ 100) separated by blanks. Only three characters appear in this string:'@' for apples,'#' for oysters, and'*' for oranges.

The input ends with two lines of zeros. The number of datasets does not exceed 20.

Output

For each dataset, output the number of people to be distributed on one line.

Examples

Input

10 10
####*****@
@#@@@@#*#*
@##***@@@*
#****#*@**
##@*#@@*##
*@@@@*@@@#
***#@*@##*
*@@@*@@##@
*@*#*@##**
@****#@@#@
0 0


Output

33


Input

10 10
*****@
@#@@@@#*#*
@##***@@@*
****#*@**
@*#@@*##
*@@@@*@@@#
***#@*@##*
*@@@*@@##@
*@*#*@##**
@****#@@#@
0 0


Output

33

Solution (in JAVA):

Solution:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Stack;
import java.util.Scanner;
import java.util.Queue;

/**
 * @author yoshikyoto
 */
class Main{
	static final boolean DEBUG = false;
	static Scanner sc = new Scanner(new InputStreamReader(System.in));
	static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	
	static char[][] field;
	static int h, w;
	public static void main(String args[]) throws Exception{
		while(true){
			int[] in = readIntMap();
			h = in[0]; w = in[1];
			if(h == 0 && w == 0) return;
			
			// 入力のパース
			field = new char[h][w];
			for(int i = 0; i < h; i++){
				String str = readLine();
				for(int j = 0; j < w; j++){
					field[i][j] = str.charAt(j);
				}
			}
			
			int count = 0;
			for(int i = 0; i < h; i++){
				for(int j = 0; j < w; j++){
					char c = field[i][j];
					if(c == '.') continue;
					count++;
					field[i][j] = '.';
					dfs(i, j, c);
				}
			}
			p(count);
		}
	}
	
	public static void dfs(int x, int y, char c){
		SI si = new SI(); si.push(x);
		SI sj = new SI(); sj.push(y);
		
		while(!si.empty()){
			int i = si.pop();
			int j = sj.pop();

			if(i > 0 && field[i-1][j] == c){
				field[i-1][j] = '.';
				si.push(i-1); sj.push(j);
			}

			if(i < h-1 && field[i+1][j] == c){
				field[i+1][j] = '.';
				si.push(i+1); sj.push(j);
			}

			if(j > 0 && field[i][j-1] == c){
				field[i][j-1] = '.';
				si.push(i); sj.push(j-1);
			}

			if(j < w-1 && field[i][j+1] == c){
				field[i][j+1] = '.';
				si.push(i); sj.push(j+1);
			}
		}
	}
		

	public static int[] readIntMap() throws IOException{return parseInt(readLine().split(" "));}
	public static String readLine() throws IOException{return br.readLine();}
	public static int readInt() throws IOException{return Integer.parseInt(br.readLine());}
	public static void pa(Object[] arr){System.out.println(Arrays.toString(arr));}
	public static void pa(int[] arr){System.out.println(Arrays.toString(arr));}
	public static void pa(double[] arr){System.out.println(Arrays.toString(arr));}
	public static void pa(boolean[] arr){System.out.println(Arrays.toString(arr));}
	public static void p(Object o){System.out.println(o.toString());}
	public static void d(Object o){if(DEBUG)System.out.println(o.toString());}
	public static void da(int[] arr){if(DEBUG)System.out.println(Arrays.toString(arr));}
	public static void sort(int[] a){Arrays.sort(a);}
	public static int[] parseInt(String[] arr){
		int[] res = new int[arr.length];
		for(int i = 0; i < arr.length; i++)res[i] = Integer.parseInt(arr[i]);
		return res;
	}
	public static boolean[] parseBool(String[] arr){
		int[] t = parseInt(arr);
		boolean[] res = new boolean[t.length];
		for(int i = 0; i < t.length; i++){
			if(t[i] == 1){
				res[i] = true;
			}else{
				res[i] = false;
			}
		}
		return res;
	}
	public static int parseInt(Object o){return Integer.parseInt(o.toString());}
	public static int digit(int n){return String.valueOf(n).length();}
	public static String reverse(String s){
		StringBuffer sb = new StringBuffer(s);
		return sb.reverse().toString();
	}
	
}

/**
 * 整数を数え上げたりするクラス
 * Prime.calc(int n) でnまでエラトステネスの篩を実行。
 * @author yoshikyoto
 * @param a[i] iが素数の時true
 * @param count[i] i以下の素数の数
 */
class Prime{
	static boolean[] a;
	static int[] count;
	public static void calc(int n){
		a = new boolean[n+1];
		a[0] = false; a[1] = false;
		for(int i = 2; i <= n; i++) a[i] = true;
		// ふるい
		for(int i = 2; i < (n - 3) / 2; i++)
			if(a[i]) for(int j = 2; j * i <= n; j++)
					a[j * i] = false;
		
		// 数え上げ
		count = new int[n+1];
		count[0] = 0;
		for(int i = 1; i <= n; i++){
			int gain = 0;
			if(a[i]) gain = 1;
			count[i] = count[i-1] + gain;
		}
	}
}

class AI extends ArrayList<Integer>{}
class SI extends Stack<Integer>{}

class MyHashMap<E> extends HashMap<E, Integer>{
	ArrayList<E> keyArray = new ArrayList<E>();
	public void add(E key){add(key, 1);}
	public void add(E key, Integer value){
		if(containsKey(key)){
			value += get(key);
		}else{
			keyArray.add(key);
		}
		put(key, value);
	}
}