How to overwrite pars of a cell array?

I have a 9x1 cell array composed of strings that looks as follows.

k = [full...
zero
zero
zero
zero
zero
zero
zero
zero]

I'm getting values for k in a for loop that undergoes 2 iterations. For the second iteration, k(8) = full and the other 8 entries are all zero. How do I prevent k from being rewritten to look like

k = [zero ...
zero
zero
zero
zero
zero
zero
full
zero] 
and instead have the first and eighth entry both say _full_ while the other seven entries say _zero_?

Answer 1

[Andrei Bobrov]

k = ['full'
'zero'
'zero'
'zero'
'zero'
'zero'
'zero'
'zero'
'zero'];

out = circshift(k,8);