import java.util.*;
import java.util.Map.Entry;
import java.math.*;
import java.awt.geom.*;
import java.io.*;
      
      
public class Main {	

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int h = sc.nextInt();
		int w = sc.nextInt();
		char[][] map = new char[h][w];
		for(int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++) {
				map[i][j] = sc.next().charAt(0);
			}
		}
		int[][] color = new int[h][w];
		int id = 0;
		for(int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++) {
				color[i][j] = id++;
			}
		}
		for(int i = 0; i < h; i++) {
			for(int j = 0; j < w; j++) {
				//if(color[i][j] != id) {
					DFS(i,j,map,color,i,j,new boolean[h][w]);
				//}
			}
		}
		int q = sc.nextInt();
		for(int i = 0; i < q; i++) {
			int r = sc.nextInt()-1;
			int c = sc.nextInt()-1;
			char x = sc.next().charAt(0);
			
			int target = color[r][c];
			
			for(int j = 0; j < h; j++) {
				for(int k = 0; k < w; k++) {
					if(color[j][k] == target) map[j][k] = x;
				}
			}
			DFS(r,c,map,color,r,c,new boolean[h][w]);
		}
		for(int i = 0; i < h; i++) {
			System.out.print(map[i][0]);
			for(int j = 1; j < w; j++) {
				System.out.print(" " + map[i][j]);
			}
			System.out.println();
		}
	}
	static int[] vx = {0,1,0,-1};
	static int[] vy = {1,0,-1,0};
	static void DFS(int a, int b, char[][] MAP, int[][] COLOR, int oa, int ob, boolean[][] al) {
		ArrayDeque<Data> queue = new ArrayDeque<Data>();
		queue.addLast(new Data(a,b,MAP,COLOR,oa,ob,al));
		while(!queue.isEmpty()) {
			
			Data tmp = queue.pollFirst();
			int Ka = tmp.a;
			int Kb = tmp.b;
			
			char[][] KMAP = tmp.MAP;
			int[][] KCOLOR = tmp.COLOR;
			int Koa = tmp.oa;
			int Kob = tmp.ob;
			boolean[][] Kal = tmp.al;
			if(Ka < 0 || Kb < 0 || Ka >= KMAP.length || Kb >= KMAP[Ka].length || KMAP[Ka][Kb] != KMAP[Koa][Kob] || Kal[Ka][Kb]) continue;
			KCOLOR[Ka][Kb] = KCOLOR[Koa][Kob];
			Kal[Ka][Kb] = true;
			for(int i = 0; i < 4; i++) {
				int ty = vy[i] + Ka;
				int tx = vx[i] + Kb;
				queue.addLast(new Data(ty,tx,KMAP,KCOLOR,Koa,Kob,Kal));
			}
		}
	}
	static class Data {
		int a;
		int b; 
		char[][] MAP; 
		int[][] COLOR; 
		int oa; 
		int ob; 
		boolean[][] al;
		Data(int a, int b, char[][] MAP, int[][] COLOR, int oa, int ob, boolean[][] al) {
			this.a = a;
			this.b = b;
			this.MAP = MAP;
			this.COLOR = COLOR;
			this.oa = oa;
			this.ob = ob;
			this.al = al;
		}
	}
}