Anyone ever tried to decipher the shipping tag on the inside of the box. What are the two columns to the right? One is an S and the other is a ? mark. There are letters in the S column for some of the chicks but not others. The letters are A, B, E, N, and P. In the ? column there are X and \\ in the individual boxes. Any ideas. I want to know everything I possibly can. We got top hats special, black frizzle cochin, Buff Brahma Bantams and Golden polish.