#! /usr/bin/env python
import sys
from screed.fasta import fasta_iter

for record in fasta_iter(open(sys.argv[1]), parse_description=False):
    area = record['name'].split()[-1]
    assert area[:2] == 'r='
    area = float(area[2:])

    if area < 500:
        print '>%s\n%s' % (record['name'], record['sequence'],)