SP14435 AMSCO2 - Decipher the AMSCO cipher

Here you have to decipher the AMSCO cipher : Due to A.M.SCOtt in the 19th century, **it's an incomplete columnar transposition cipher with alternating single letters and digraphs**. The first entry must be a digraph. In both even and odd periods the first column and the first row always alternate: **7** **4** **5** **6** **3** **2** **1** **RI** **D** **ER** **S** **ON** **T** **HE** **S** **TO** **R** **MI** **N** **TO** **T** **HI** **S** **HO** **U** **SE** **W** **EA** **R** **EB** **O** **RN** **J** **IM** **M** **OR** **R** **IS** **O** **N** ### Input N lines (N

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