How to separate code words on the basis of hamming distance ?

I have 5 code words of length 4, 1111 , 1123 , 1223 , 3111 , 1234.

Out of all possible pairs of these 5 How I separate code words with hamming distance 3

[Walter Roberson]

It is not clear what the difference is between this question and your later question https://www.mathworks.com/matlabcentral/answers/379060-how-i-separate-codewords-on-the-basis-of-hamming-distance .