Written by Emily Leng
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Haven't you already used a Shift Key in a previous problem?
By translating the code we get
We are redirected to this document and get a caesar cipher. Decoding it yeilds the key.
$ echo "snhj btwp! ymnx hnumjw xmtzqi gj kfrnqnfw yt dtz, tw rfdgj sty. fsdbfd, fx f wjbfwi, mfaj ymnx kqfl. q1s3x_fsi_i0yx_y0_b0wie"|caesar
nice work! this cipher should be familiar to you, or maybe not. anyway, as a reward, have this flag. l1n3s_and_d0ts_t0_w0rdz
l1n3s_and_d0ts_t0_w0rdz