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The key for layer 2 is :

8JYIy&BRIkLi\<7mku]nJGRS9YXwXs#udwvCr`]MT`V02"8@J0c%9ZC/*t7'r&@W

good job. looks "almost" like my latest attempt :-) with those "`"

I figured out the back quote too. But I was dumbfounded by the backslash.

yes, as I wrote above. The key is definitely wrong. maybe markdown messed it up. They need to post as code