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#725224
string = {}string[0] = 'Li'string[1] = 'Cs'string[2] = 'H_'string[3] = 'P-'string[4] = 'CA'string[5] = 'N_'string[6] = 'H_'ptval = {}ptval['H_'] = '001'ptval['He'] = '002'ptval['Li'] = '003'for element in string: if element in ptval.keys(): print ptval[element]