Finding positions and comparing two arrays

Hi everyone, My question is, how can I change matrix b to c?

c shows the position of b in a.

a=[18 11 12 14 10 15]

b=[10 14 12 15

12 11 12 18

11 14 18 15

18 11 15 18]

c=[5 4 3 6

3 2 3 1

2 4 1 6

1 2 6 1]

Thank you in advance for any advice you can offer.

Answer 1

[Walter Roberson]

[~, c] = ismember(b, a);

[gonzalo salazar]

Thank you very much.