C1212121231123232233131323223313233313231323222313231323123121121   >>    C121212123112323223313132322331323331323132322231323132312312112   <<    C1212121231123232233131323223313233313231323222313231323123121123   >>      C1212121231123232233131323223313233313231323222313231323123121122   >>