Remove redundancy values from matrix

Any possible to remove the duplicate entries

S=[2 3 4 5 4 4 4;2 3 4 2 3 4 5;3 4 4 5 5 2 3];

I want the output will be

A=[2 3 4 5]

Answer 1

[Wayne King]

S=[2 3 4 5 4 4 4;2 3 4 2 3 4 5;3 4 4 5 5 2 3];
S1 = unique(S);

Answer 2

[Andrei Bobrov]

A = unique(S).';