def get_all_strings_with_a_given_alphabet_and_length(alphabet, length):
	strings = ['']
	for i in range(length):
		s = [s + c for s in strings for c in alphabet]
		strings += s

	# Remove duplicates (set() isn't as nice as it doesn't preserve order, at least for verification purposes)
	strings = list(dict.fromkeys(strings))
	return strings


def replace_empty_string_with_symbol(strings):
	symbol = 'ε'
	for i in range(len(strings)):
		if strings[i] == '':
			strings[i] = symbol
	return strings


def print_strings(strings):
	strings = replace_empty_string_with_symbol(strings)
	# print(len(strings))
	print(strings)