import random


def randomString(l):
    """ 
    Make an random password.
    """
    charlist = "abcdefghijkmnpqrstuvwxyz12345678_ABCDEFGHIJKMNPQRSTUVWXYZ"
    r = []
    for i in range(0,l):
        c = random.sample(charlist,1)
        r.append("".join(c))
    return "".join(r)