add element to cell

I have E and M

E=[1  2;1  5;2  3;2  4;2  5;3  4;4  5;4  7;4  9;5  6;6  11;6  12;6  13;
7  8;7  9;9  10;9  14;10  11;12  13;13  14]
M = {[1,2,5],[2,4,5],[2,3,4],[4,7,9],[6,12,13],[6,9,10,11,13,14],[4,5,6,9,10,11]};

As you can see all element in E is used in M except element 8. I want to write a code that if some element is not used in M, add that row of matrix E to the as a new cell in M. So I want this result

new_M== {[1,2,5],[2,4,5],[2,3,4],[4,7,9],[6,12,13],[6,9,10,11,13,14],[4,5,6,9,10,11],[7,8]};

Answer 1

[Stephen23]

>> idx = ~all(ismember(E,[M{:}]),2);
>> M = [M(:);num2cell(E(idx,:),2)];
>> M{:}
ans =
    1    2    5
ans =
    2    4    5
ans =
    2    3    4
ans =
    4    7    9
ans =
    6   12   13
ans =
    6    9   10   11   13   14
ans =
    4    5    6    9   10   11
ans =
    7    8