Substitution Cipher

Someone gave me this, but I haven't the slightest idea as to what it says! https://mega.nz/#!iCBz2IIL!B7292dJSx1PGXoWhd9oFLk2g0NFqGApBaItI_2Gsp9w

Figure it out for me, will ya?

• The characters in the text are encoded using simple Substitution cipher.

• We can use quipqiup to decode the cipher.

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CTFlearn{IFONLYMODERNCRYPTOWASLIKETHIS}