Question on adding sets

Suppose X is a collection of unique combination of sets: Example: X = ({1,2,3},{1,3,4},{1,4}) suppose I encounter another unique combination of set. How do I add it to my existing set X.

Answer 1

[Matt J]

>> X = {{1,2,3},{1,3,4},{1,4}};  Y={{10 10 10},{3 2 1}}; 

>> Combined=[X,Y]; 

>> Combined{:}

ans = 

      [1]    [2]    [3]

ans = 

      [1]    [3]    [4]

ans = 

      [1]    [4]

ans = 

      [10]    [10]    [10]

ans = 

      [3]    [2]    [1]