import java.util.Scanner;

public class Main {
	// Battle Town 9:52-11:18
	static Scanner sc = new Scanner(System.in);

	static void solve(){
		int[] dx = {-1,0,1,0}; int[] dy={0,1,0,-1};
		int x = sc.nextInt(); int y = sc.nextInt();
		String[] sen={"^",">","v","<"};
		String[] zyo={"U","R","D","L"};
		StringBuffer[] field = new StringBuffer[x];
		int xx=0;int yy=0;int d=0;
		for(int a=0;a<x;a++){
			String te = sc.next();
			for(int b=0;b<4;b++){
				if(te.indexOf(sen[b])!=-1){
					xx=a;yy=te.indexOf(sen[b]);d=b;
					te = te.replace(sen[b].charAt(0),'.');
					break;
				}
			}
			field[a] = new StringBuffer(te);
		}

		int len = sc.nextInt();
		String com = sc.next();
		for(int a=0;a<len;a++){
			if(com.charAt(a)=='S'){
				int tx = xx+dx[d]; int ty = yy+dy[d];
				while(tx>=0&&tx<x&&ty>=0&&ty<y){
					if(field[tx].charAt(ty)=='#') break;
					else if(field[tx].charAt(ty)=='*'){
						field[tx].replace(ty,ty+1,".");
						break;
					}
					tx += dx[d]; ty += dy[d];
				}
			}else{
				for(int b=0;b<4;b++){
					if(com.charAt(a)==zyo[b].charAt(0)){
						d = b;
						if(xx+dx[d]>=0&&xx+dx[d]<x&&yy+dy[d]>=0&&yy+dy[d]<y){
							xx += dx[d]; yy +=dy[d];
							if(field[xx].charAt(yy)!='.'){
								xx -= dx[d]; yy -=dy[d];
							}
						}
					}
				}
			}
		}

		field[xx].replace(yy,yy+1,sen[d]); //最後の戦車位置
		for(int a=0;a<x;a++) System.out.println(field[a].substring(0));
	}
	public static void main(String[] args) {
		int n = sc.nextInt();
		for(int a=0;a<n-1;a++){
			solve();
			System.out.println();
		}
		solve(); //最後の出力後の改行はないので…
	}

}