Creating a list of given length and sequence from a user in python

If I have a specific list with specific letters, how do I first ask the user to input a random number of sequences they want, then a random number of length of the sequence they want, and then generate a list with that information.

EX:

list = ['A', 'B', 'C', 'D']

number of sequence user wants: 25

length of sequence user wants: 6

output:

    sequence 1: BCADAC
    sequence 2: ABCDBA
    sequence 3: DCBADC
    .....
    sequence 25: CABADB