import random

def GenerateBetterTid(length=7):
    chardict = "abcdefghijklmnopqrstuvwxyz"

    lastnum = random.randrange(0, len(chardict))
    result = chardict[lastnum]
    for i in range(1, length):
        num = random.randrange(0, len(chardict)-1)
        if num >= lastnum:
            num += 1
        result += chardict[num]
        lastnum = num
    return result