import random

s = str(input("Введите текст: "))
y = int(input("Введите число: "))

v = ["абв", "бва", "ваб", "бав", "вба"]

count_of_elements = int(input())
used_indexes = {}
for i in range(count_of_elements):
    current_index = random.randint(0, len(v) - 1)
    while used_indexes.get(current_index, -1) != -1:
        current_index = random.randint(0, len(v) - 1)
    used_indexes[current_index] = 1