import random, string

#Where created IDs will go to be checked for duplicates as newer IDs get generated.
usedID = []

#Defining range of acceptable characters
b64 = string.digits + string.ascii_uppercase + string.ascii_lowercase + "-" + "_"

def generate(requested):
    count = 1
    for j in  range (requested):
        output = ""
        while output not in usedID:
            for i in range(11):
                rNum = random.randint(0, 63)
                digit = str(b64[rNum])
                output += digit
                digit = ""
            if output not in usedID:
                usedID.append(output)
                usedID.sort()
                print("{}/{}: {}".format(count, requested, output))
                count = count + 1
                break

req = int(input("Welcome!  Type in a number to receive a custom amount of unique Base64 YouTube IDs!\n"))

generate(req)

print("Enjoy!")