C123211131133132233131323132313233313233313132313133313231333132313221221   >>    C12321113113313223313132313231323331323331313231313331323133313231322122   <<    C123211131133132233131323132313233313233313132313133313231333132313221223   >>      C123211131133132233131323132313233313233313132313133313231333132313221222   >>