C1212121231123232233131323223313231333132333132322331323132333112111   >>    C121212123112323223313132322331323133313233313232233132313233311211   <<    C1212121231123232233131323223313231333132333132322331323132333112113   >>      C1212121231123232233131323223313231333132333132322331323132333112112   >>