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-s flag , as suggested, does not support. it throws the error : not a recognized flag.

i am not sure whether sort is useful of not. but i want the output as i mentioned.

please suggest.

i have a '|' delimited file having 4 fields.
now i want to sort the data by combination of first three fields without changing order of 4th field.
input file looks like this:

3245|G|kop|45...