what would i fill the blank with in order to make the code work

# Pretty Pattern Generator # Ask the user for the character to print character = "Fill this in" # Ask the user for the number of rows and columns size = "Fill this in" # Iterate over the rows. for row in range("Fill this in"): # Each row has fewer columns. for col in range("Fill this in", "Fill this in", "Fill this in"): print(character, end='') # Go to the next row. print()