import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		// ????????????????????°?????\???
		Scanner in = new Scanner(System.in);
		int dataSet = in.nextInt();

		// ????????????????????°?????????????????????
		for(int i = 0; i < dataSet; i++){

			// ?????????????????¨?¨????????????\???
			int height = in.nextInt();
			int width = in.nextInt();

			// ????????????????????????????´???????????¬??????????
			String[][] townMap = new String[height][width];

			// ???????????????????????????
			for(int j = 0; j < height; j ++){

				// ???????????????????????\???
				String mapData = in.next();

				// ??\????????????????????????????????????
				townMap[j] = mapData.split("");

			}

			// ?????£????????????????????§????????????
			Field field = new Field(townMap);
			// ??????????????????????????????
			int[] tankPosition = field.tankPosition();
			// ????????????????????????
			String tankDirection = townMap[tankPosition[0]][tankPosition[1]];
			// ?????????????????§???????????????
			Tank tank = new Tank(tankPosition, tankDirection);

			// ??????????????????????????°?????\???
			int commandCount = in.nextInt();

			// ??\????????????????????????????????\??????????????????????????????1????????????????????????????????????????´?
			String commands = in.next();
			char[] commandArray = commands.toCharArray();

			// ???????????°?????????????????????
			for(int j = 0; j < commandCount; j++){

				// ??????????????????????????´???
				if(commandArray[j] == 'S'){

					// ???????????????????????????
					tank.shoot(tankDirection, field);

				// ?§???????????????´???
				} else {

					// ???????§????????????????
					tank.move(commandArray[j], field);
					tankPosition = field.tankPosition();
					tankDirection = townMap[tankPosition[0]][tankPosition[1]];

				}

			}

			// ????????????
			int j = 0;
			int k = 0;

			// ???????????????????????????
			for(j = 0; j < height; j++) {

				for(k = 0; k < width; k++) {

					if(k < width - 1) {

						System.out.print(townMap[j][k]);

					// ???????????¨??????????????\??????
					} else {

						System.out.println(townMap[j][k]);

					}
				}
			}

			// ??????????????????????????¨????????????????????\??????
			if(i < dataSet - 1) {

				System.out.println();

			}
		}
	}
}

// ?????£??????????????????
class Field{

	// ?????£??????????????°
	String[][] field;

	// ?????????????????????
	Field(String[][] field){

		this.field = new String[field.length][];

		for(int i = 0; i < field.length; i++) {

			this.field[i] = field[i];

			for(int j = 0; j < field[i].length; j++) {

				this.field[i][j] = field[i][j];

			}
		}
	}

	// ??????????????????????´¢??????????????????
	int[] tankPosition() {

		int[] tankPosition = new int[2];

		for(int i = 0; i < this.field.length; i++) {

			for(int j = 0; j < this.field[i].length; j++) {

				if(field[i][j].equals("^") || field[i][j].equals("v")
						|| field[i][j].equals("<") || field[i][j].equals(">")) {

					tankPosition[0] = i;
					tankPosition[1] = j;
				}
			}
		}

		return tankPosition;

	}
}

// ???????????????
class Tank{

	// ?????£??????????????°
	int[] tankPosition = new int[2];
	String tankDirection;

	// ?????????????????????
	Tank(int[] tankPosition, String tankDirection) {

		this.tankPosition[0] = tankPosition[0];
		this.tankPosition[1] = tankPosition[1];
		this.tankDirection = tankDirection;
	}

	// ??????????§??????????????????????
	void move(char command, Field field) {

		// ??\????????????????????¨?????????
		switch(command) {

		// ???????§????????????????
		case 'U':

			// ???????????°???????§????
			if(tankPosition[0] != 0 && field.field[tankPosition[0] - 1][tankPosition[1]].equals(".")){

				// ??????????????´????????????????????????????????????
				field.field[tankPosition[0] - 1][tankPosition[1]] = "^";
				// ??????????????´???????????°???????????????
				field.field[tankPosition[0]][tankPosition[1]] = ".";
				// ?????????????????¨??°?????£??\
				tankPosition[0] = tankPosition[0] - 1;

			} else {

				// ???????§?????????????????????¨??°??§????????????????????????
				field.field[tankPosition[0]][tankPosition[1]] = "^";

			}

			break;

		case 'D':

			// ???????????°???????§????
			if(tankPosition[0] != field.field.length - 1 && field.field[tankPosition[0] + 1][tankPosition[1]].equals(".")){

				// ??????????????´????????????????????????????????????
				field.field[tankPosition[0] + 1][tankPosition[1]] = "v";
				// ??????????????´???????????°???????????????
				field.field[tankPosition[0]][tankPosition[1]] = ".";
				// ?????????????????¨??°?????£??\
				tankPosition[0] = tankPosition[0] + 1;

			} else {

				// ???????§?????????????????????¨??°??§????????????????????????
				field.field[tankPosition[0]][tankPosition[1]] = "v";

			}

			break;

		case 'L':

			// ???????????°???????§????
			if(tankPosition[1] != 0 && field.field[tankPosition[0]][tankPosition[1] - 1].equals(".")){

				// ??????????????´????????????????????????????????????
				field.field[tankPosition[0]][tankPosition[1] - 1] = "<";
				// ??????????????´???????????°???????????????
				field.field[tankPosition[0]][tankPosition[1]] = ".";
				// ?????????????????¨??°?????£??\
				tankPosition[1] = tankPosition[1] - 1;

			} else {

				// ???????§?????????????????????¨??°??§????????????????????????
				field.field[tankPosition[0]][tankPosition[1]] = "<";

			}

			break;

		case 'R':

			// ???????????°???????§????
			if(tankPosition[1] != field.field[0].length - 1 && field.field[tankPosition[0]][tankPosition[1] + 1].equals(".")){

				// ??????????????´????????????????????????????????????
				field.field[tankPosition[0]][tankPosition[1] + 1] = ">";
				// ??????????????´???????????°???????????????
				field.field[tankPosition[0]][tankPosition[1]] = ".";
				// ?????????????????¨??°?????£??\
				tankPosition[1] = tankPosition[1] + 1;

			} else {

				// ???????§?????????????????????¨??°??§????????????????????????
				field.field[tankPosition[0]][tankPosition[1]] = ">";

			}

			break;

		}
	}

	// ???????????????????????????
	void shoot(String tankDirection, Field field) {

		// ??????????????¨??°??¨??????(????°???????)?????????????????????
		switch(tankDirection) {

		// ????°?????????????
		case "^":

			// ????°????????????????????????????????????\????§????
			for(int i = tankPosition[0] - 1; i >= 0; i--) {

				// ???????£??????¶???????????¨???????¶???????
				if(field.field[i][tankPosition[1]].equals("#")) {

					break;

				// ??¬?????¬????£??????¶???????????¨??????????????°????????£??????????¶???????
				} else if(field.field[i][tankPosition[1]].equals("*")) {

					field.field[i][tankPosition[1]] = ".";
					break;

				}
			}

			break;

		// ????°?????????????
		case "v":

			for(int i = tankPosition[0] + 1; i < field.field.length; i++) {

				if(field.field[i][tankPosition[1]].equals("#")) {

					break;

				} else if(field.field[i][tankPosition[1]].equals("*")) {

					field.field[i][tankPosition[1]] = ".";
					break;

				}
			}

			break;

		// ????°?????????????
		case "<":

			for(int i = tankPosition[1] - 1; i >= 0; i--) {

				if(field.field[tankPosition[0]][i].equals("#")) {

					break;

				} else if(field.field[tankPosition[0]][i].equals("*")) {

					field.field[tankPosition[0]][i] = ".";
					break;

				}
			}

			break;

		// ????°?????????????
		case ">":

			for(int i = tankPosition[1] + 1; i < field.field[0].length; i++) {

				if(field.field[tankPosition[0]][i].equals("#")) {

					break;

				} else if(field.field[tankPosition[0]][i].equals("*")) {

					field.field[tankPosition[0]][i] = ".";
					break;

				}
			}

			break;

		}
	}
}


//===========================??????=============================================

/*public class MainBatlleTown {

	public static void main(String[] args) {

		// ????????????????????°?????\???
		Scanner in = new Scanner(System.in);
		int dataSet = in.nextInt();

		// ????????????????????°?????????????????????
		for(int i = 0; i < dataSet; i++){

			// ?????????????????¨?¨????????????\???
			int height = in.nextInt();
			int width = in.nextInt();

			// ????????????????????????????´???????????¬??????????
			String[][] townMap = new String[height][width];

			// ???????????????????????????
			for(int j = 0; j < height; j ++){

				// ???????????????????????\???
				String mapData = in.next();

				// ??\????????????????????????????????????
				townMap[j] = mapData.split("");

			}

			// ??????????????????????????????
			int tankPositionH = 0;
			int tankPositionW = 0;

			for(int j = 0; j < height; j++) {

				for(int k = 0; k < width; k++) {

					if(townMap[j][k].equals("^") || townMap[j][k].equals("v")
							|| townMap[j][k].equals("<") || townMap[j][k].equals(">")) {

						tankPositionH = j;
						tankPositionW = k;

					}
				}
			}

			// ??????????????????????????°?????\???
			int commandCount = in.nextInt();

			// ??\????????????????????????????????\??????????????????????????????1????????????????????????????????????????´?
			String commands = in.next();
			char[] commandArray = commands.toCharArray();

			// ?????????????????§???????????????
			Tank tank = new Tank();

			// ???????????°?????????????????????
			for(int j = 0; j < commandCount; j++){

				// ??????????????????????????´???
				if(commandArray[j] == 'S'){

					// ???????????????????????????
					tank.shoot(townMap, height, width, tankPositionH, tankPositionW);


				// ??????????§?????????´???
				} else if(commandArray[j] == 'U' || commandArray[j] == 'D'){

					// ?§??????????????????§??????????§????(?????????)
					tankPositionH = tank.move(commandArray[j], townMap, height, width, tankPositionH, tankPositionW);

				// ?¨????????§?????????´???
				} else {

					// ?§??????????????????§??????????§????(?¨???????)
					tankPositionW = tank.move(commandArray[j], townMap, height, width, tankPositionH, tankPositionW);

				}
			}

			// ????????????
			int j = 0;
			int k = 0;

			// ???????????????????????????
			for(j = 0; j < height; j++) {

				for(k = 0; k < width; k++) {

					if(k < width - 1) {

						System.out.print(townMap[j][k]);

					// ???????????¨??????????????\??????
					} else {

						System.out.println(townMap[j][k]);

					}
				}
			}

			// ??????????????????????????¨????????????????????\??????
			if(i < dataSet - 1) {

				System.out.println();

			}
		}
	}
}


// ???????????????
class Tank{

	// ??????????§??????????????????????
	int move(char command, String[][] townMap, int height, int width, int tankPositionH, int tankPositionW){

		// ?????????(??????????????¨??°)?????\???????????°
		int tankPosition = 0;

		// ??\????????????????????¨?????????
		switch(command){

		// ???????§????????????????
		case 'U':

			// ???????????°???????§????
			if(tankPositionH != 0 && townMap[tankPositionH - 1][tankPositionW].equals(".")) {

				// ?????¨??°????????????????????????????????????????????????
				townMap[tankPositionH - 1][tankPositionW] = "^";
				// ?????¨??°????????°???????????????
				townMap[tankPositionH][tankPositionW] = ".";

				// ?§???????????????¨??°?????????????????£??\
				tankPosition = tankPositionH - 1;

			// ???????????°?????????????????°?????????????????´
			} else {

				// ???????????´
				townMap[tankPositionH][tankPositionW] = "^";
				// ?????¨??°?????????????????£??\
				tankPosition = tankPositionH;

			}

			break;

		// ???????§????????????????
		case 'D':

			if(tankPositionH != height - 1 && townMap[tankPositionH + 1][tankPositionW].equals(".")) {

				townMap[tankPositionH + 1][tankPositionW] = "v";
				townMap[tankPositionH][tankPositionW] = ".";

				tankPosition = tankPositionH + 1;

			} else {

				townMap[tankPositionH][tankPositionW] = "v";
				tankPosition = tankPositionH;

			}

			break;

		// ??????????????????
		case 'L':

			if(tankPositionW != 0 && townMap[tankPositionH][tankPositionW - 1].equals(".")) {

				townMap[tankPositionH][tankPositionW - 1] = "<";
				townMap[tankPositionH][tankPositionW] = ".";

				tankPosition = tankPositionW - 1;

			} else {

				townMap[tankPositionH][tankPositionW] = "<";
				tankPosition = tankPositionW;

			}

			break;

		// ??????????????????
		case 'R':

			if(tankPositionW != width - 1 && townMap[tankPositionH][tankPositionW + 1].equals(".")) {

				townMap[tankPositionH][tankPositionW + 1] = ">";
				townMap[tankPositionH][tankPositionW] = ".";

				tankPosition = tankPositionW + 1;

			} else {

				townMap[tankPositionH][tankPositionW] = ">";
				tankPosition = tankPositionW;

			}

			break;
		}

		// ?????´??????????????¨??°???????????????
		return tankPosition;

	}


	// ???????????????????????????
	void shoot(String[][] townMap, int height, int width, int tankPositionH, int tankPositionW) {

		// ??????????????¨??°??¨??????(????°???????)?????????????????????
		switch(townMap[tankPositionH][tankPositionW]) {

		// ????°?????????????
		case "^":

			// ????°????????????????????????????????????\????§????
			for(int i = tankPositionH - 1; i >= 0; i--) {

				// ???????£??????¶???????????¨???????¶???????
				if(townMap[i][tankPositionW].equals("#")) {

					break;

				// ??¬?????¬????£??????¶???????????¨??????????????°????????£??????????¶???????
				} else if(townMap[i][tankPositionW].equals("*")) {

					townMap[i][tankPositionW] = ".";
					break;

				}
			}

			break;

		// ????°??????????
		case "v":

			for(int i = tankPositionH + 1; i < height; i++) {

				if(townMap[i][tankPositionW].equals("#")) {

					break;

				} else if(townMap[i][tankPositionW].equals("*")) {

					townMap[i][tankPositionW] = ".";
					break;

				}
			}

			break;

		// ????°?????????????
		case "<":

			for(int i = tankPositionW - 1; i >= 0; i--) {

				if(townMap[tankPositionH][i].equals("#")) {

					break;

				} else if(townMap[tankPositionH][i].equals("*")) {

					townMap[tankPositionH][i] = ".";
					break;

				}
			}

			break;

		// ????°?????????????
		case ">":

			for(int i = tankPositionW + 1; i < width; i++) {

				if(townMap[tankPositionH][i].equals("#")) {

					break;

				} else if(townMap[tankPositionH][i].equals("*")) {

					townMap[tankPositionH][i] = ".";
					break;

				}
			}

			break;

		}
	}
}*/

//=======================================================================

			//???????????°?????????????????????
			/*for(int j = 0; j < commandCount; j++){

				if(commandArray[j] == 'S'){

					// ?????????????????????????????§??????????????????
					tank.shoot(townMap, height, width, tankPositionH, tankPositionW);


				} else if(commandArray[j] == 'U' || commandArray[j] == 'D'){

					// ????????????????????????
					// String direction = tank.changeDirection(commandArray[j]);
					tankPositionH = tank.changeDirection(commandArray[j], townMap, height, width, tankPositionH, tankPositionW);

				} else {

					tankPositionW = tank.changeDirection(commandArray[j], townMap, height, width, tankPositionH, tankPositionW);


					// ????????????????????????????????¨??????????????´
					switch(direction) {

					case "^":

						if(tankPositionH != 0 && townMap[tankPositionH - 1][tankPositionW].equals(".")) {

							townMap[tankPositionH - 1][tankPositionW] = "^";
							townMap[tankPositionH][tankPositionW] = ".";

							tankPositionH = tankPositionH - 1;

						} else {

							townMap[tankPositionH][tankPositionW] = "^";

						}

						break;

					case "v":

						if(tankPositionH != height - 1 && townMap[tankPositionH + 1][tankPositionW].equals(".")) {

							townMap[tankPositionH + 1][tankPositionW] = "v";
							townMap[tankPositionH][tankPositionW] = ".";

							tankPositionH = tankPositionH + 1;

						} else {

							townMap[tankPositionH][tankPositionW] = "v";

						}

						break;

					case "<":

						if(tankPositionW != 0 && townMap[tankPositionH][tankPositionW - 1].equals(".")) {

							townMap[tankPositionH][tankPositionW - 1] = "<";
							townMap[tankPositionH][tankPositionW] = ".";

							tankPositionW = tankPositionW - 1;

						} else {

							townMap[tankPositionH][tankPositionW] = "<";

						}

						break;

					case ">":

						if(tankPositionW != width - 1 && townMap[tankPositionH][tankPositionW + 1].equals(".")) {

							townMap[tankPositionH][tankPositionW + 1] = ">";
							townMap[tankPositionH][tankPositionW] = ".";

							tankPositionW = tankPositionW + 1;

						} else {

							townMap[tankPositionH][tankPositionW] = ">";

						}

						break;
					}*/


				//String direction = tank.changeDirection(commandArray[j]);

				//String direction = null;

				/*
				switch(direction){
				case 'U':

					direction = "^";
					break;

				case 'D':

					direction = "v";
					break;

				case 'L':

					direction = "<";
					break;

				case 'R':

					direction = ">";
					break;

				}

				return direction;

			}*/

Measured memory_bytes: 38896