import random
from string import ascii_lowercase

def rand_letters(a):
    return "".join(random.choices(ascii_lowercase[:10], k=a))

count = 5
print(count)
for i in range(count):
    size = random.randint(0, 100000)
    repl = random.randint(0, 10)
    print(size, repl)
    print(rand_letters(size))
    print(rand_letters(size))