Retake Exam - 16 December 2020 (problem2)

text = list(input())
n = int(input())

matrix = []

for i in range(n):
    matrix.append([el for el in input()])

m = int(input())

for row in range(n):
    for col in range(n):
        if matrix[row][col] == "P":
            start_row = row
            start_col = col
matrix[start_row][start_col] = "-"

for i in range(m):
    command = input()

    if command == "up":
        new_row = start_row - 1
        new_col = start_col

        if new_row not in range(n) or new_col not in range(n):
            text.pop()
            new_row = start_row
            new_col = start_col
        else:
            next_point = matrix[new_row][new_col]
            if next_point != "-":
                text.append(next_point)
                matrix[new_row][new_col] = "-"

    elif command == "down":
        new_row = start_row + 1
        new_col = start_col

        if new_row not in range(n) or new_col not in range(n):
            text.pop()
            new_row = start_row
            new_col = start_col
        else:
            next_point = matrix[new_row][new_col]
            if next_point != "-":
                text.append(next_point)
                matrix[new_row][new_col] = "-"

    elif command == "left":
        new_row = start_row
        new_col = start_col - 1

        if new_row not in range(n) or new_col not in range(n):
            text.pop()
            new_row = start_row
            new_col = start_col
        else:
            next_point = matrix[new_row][new_col]
            if next_point != "-":
                text.append(next_point)
                matrix[new_row][new_col] = "-"

    elif command == "right":
        new_row = start_row
        new_col = start_col + 1

        if new_row not in range(n) or new_col not in range(n):
            text.pop()
            new_row = start_row
            new_col = start_col
        else:
            next_point = matrix[new_row][new_col]
            if next_point != "-":
                text.append(next_point)
                matrix[new_row][new_col] = "-"

    start_row = new_row
    start_col = new_col


matrix[start_row][start_col] = "P"
print("".join(text))
for row in matrix:
    print("".join(row))