C1231221313231323131133131333131232313331323131123313232233132313232221211   >>    C123122131323132313113313133313123231333132313112331323223313231323222121   <<    C1231221313231323131133131333131232313331323131123313232233132313232221213   >>      C1231221313231323131133131333131232313331323131123313232233132313232221212   >>