import random

lower = "abcdefghijklmnopqrstuvwxyz"
upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
numbers = "0123456789"
symbols = "!$%&/?+*-#"

def genNum(length):
    gen(numbers, length)

def genLetLow(length):
    gen(lower, length)

def genLetUp(length):
    gen(upper, length)

def genLet(length):
    gen(lower + upper, length)

def genLetNum(length):
    gen(lower + upper + numbers, length)

def genFull(length):
    gen(lower + upper + numbers + symbols, length)

def gen(chars, length):
    print(''.join(random.choice(chars) for _ in range(length)))