#!/usr/bin/env python
# ch3-3.py
from openeye.oechem import *
import sys
 
smilein = raw_input()
while smilein:
    mol = OEGraphMol()
    if (OEParseSmiles(mol, smilein) == 1):
        OEAssignAromaticFlags(mol)
        smi = OECreateCanSmiString(mol)
        sys.stdout.write("%s\n" % smi)
    else:
        sys.stderr.write("%s is an invalid SMILES!" % smilein)
    smilein = raw_input()