import os
chains_for_pbd=dict()
file_list = os.listdir("top500H")

for file in file_list :
    pdb = file[0:4].upper()
    chains = file[4:-1]
    assert pdb.lower() + chains + "H" == file
    if pdb in chains_for_pbd :
        print "Merging separate entries for %s chains %s and %s" \
              % (pdb, chains_for_pbd[pdb], chains)
        chains_for_pbd[pdb] = chains_for_pbd[pdb] + chains
    else :
        chains_for_pbd[pdb]=chains
        
pdb_names = chains_for_pbd.keys()
pdb_names.sort()
output_file = open("top500_list.tsv","w")
for pdb in pdb_names:
    output_file.write("%s\t%s\n" % (pdb, chains_for_pbd[pdb]))
output_file.close()