How to find a word from arrays of characters?

Question

What is the best way to solve this:

I have a group of arrays with 3-4 characters inside each like so:

{p,     {a,    {t,    {m,
 q,      b,     u,            


        

Answer 1

I just made a very large nested for loop like this:

for(NSString*s1 in [letterList objectAtIndex:0]{
    for(NSString*s2 in [letterList objectAtIndex:1]{
       8 more times...
    }
}

Then I do a binary search on the combination to see if it is in the dictionary and add it to an array if it is