Dear Sir/Madam,

  I have issuing this command:

cat all_nouns.txt | cut -f1,3 | sort -t\t -k2,1

I expected that second column will be sorted A1,A2,B1,B2,C1,C2, but it is

only almost true; at the end of file, I see:

C2

... [many C2]

C2

B1

B1

B2

B2

A2

C1

A2

which is not sorted.

Attaching the file.

Regards

Tomas Kyselica