C12121223131323223313233231323133313233313131323131133132212111   >>    C1212122313132322331323323132313331323331313132313113313221211   <<    C12121223131323223313233231323133313233313131323131133132212113   >>      C12121223131323223313233231323133313233313131323131133132212112   >>