#!/bin/sh

# Public domain notice for all NCBI EDirect scripts is located at:
# https://www.ncbi.nlm.nih.gov/books/NBK179288/#chapter6.Public_Domain_Notice

limit=1

if [ $# -gt 0 ]
then
  limit=$1
  shift
fi

awk -v limit=$limit -F '\t' '(NR == 1) { key = $1 } ($1 != key) { key = $1; limit-- } (limit < 1) { exit } { print }'
