C112233313331323223313331311331323131133132311331323132313232231   >>    C11223331333132322331333131133132313113313231133132313231323223   <<    C112233313331323223313331311331323131133132311331323132313232233   >>      C112233313331323223313331311331323131133132311331323132313232232   >>