Write a program that takes a string of lowercase characters as input and prints it in uppercase, reversed.

Sure, here is a simple program that does that:

# Get input from user
input_string = input("Enter a string: ")

# Convert string to uppercase
uppercase_string = input_string.upper()

# Reverse the string
reversed_string = uppercase_string[::-1]

# Print the reversed, uppercase string
print(reversed_string)

This program works as follows:

1. It prompts the user to enter a string.
2. It converts the string to uppercase using the upper() method.
3. It reverses the string by using slicing with a step of -1, which means start at the end of the string and end at position 0, move with the step -1 (which means one step backwards).
4. Finally, it prints the reversed, uppercase string.