C123211131133132233131323132313233313233313132313133313231323133112122321   >>    C12321113113313223313132313231323331323331313231313331323132313311212232   <<    C123211131133132233131323132313233313233313132313133313231323133112122323   >>      C123211131133132233131323132313233313233313132313133313231323133112122322   >>