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  1. import re
  2.  
  3. for i in ['NaCl', 'H2CO3']:
  4. print(re.findall('[A-Z][^A-Z]*', i))
Success #stdin #stdout 0.03s 9568KB
stdin
Standard input is empty
stdout
['Na', 'Cl']
['H2', 'C', 'O3']