Question: Encrypt the message we are all together using a double transposition cipher (of the type described in the text) with 4 rows and 4 columns,

Encrypt the message we are all together using a double transposition cipher (of the type described in the text) with 4 rows and 4 columns, using the row permutation (1,2,3,4) => (2,4,1,3) and the column permutation (1,2,3,4) => (3,1,2,4).

I am having trouble doing the column permutation

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