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I gave the patterns I would like to search for:

pattern1 = "config router id x.x.x.x"
pattern2 = "interface passive x.x.x.x"
pattern3 = "x.x.x.x 255.255.255.255 area"

The desired output is: ...

Hello all,

I have many files in a directory and I'm trying to read each file in the directory, search for four patterns and return the name of the file only if it contains each of the 4 patterns....