Hello all!
I want to know how I can select only duplicate entries in a text. For instance, assume the following text sample:
protein1   stomach
protein2   head
protein3   muscle
protein3   heart
protein3   brain
protein4   leg
protein5   toes
protein5   mouth
protein6   ear

[download]
What I want to print is in a separate file the proteins that appear once, and, in another file, the proteins that appear twice, three times etc...
Any ideas?
Thank you!

In reply to select only duplicate entries by Anonymous Monk

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