C2313111122233131121133132311113313223313231333132333132313232211231   >>    C231311112223313112113313231111331322331323133313233313231323221123   <<    C2313111122233131121133132311113313223313231333132333132313232211233   >>      C2313111122233131121133132311113313223313231333132333132313232211232   >>