2.3.21 Hamming distance. The Hamming distance between two bit strings of length n is equal to the number of bits in which the two strings differ. Write a program that reads in an integer k and a bit string s from the command line, and prints all bit strings that have Hamming distance less than or equal to k from s.

With the following shell commands and inputs:

java HamDistance 3 1100

output:

1100 0100 1000 1110 1101 0000 0110 0101 1010 1001 1111 0010 0001 0111 1011