C11231123231313231323131323132322331323331333132313331323222211   >>    C1123112323131323132313132313232233132333133313231333132322221   <<    C11231123231313231323131323132322331323331333132313331323222213   >>      C11231123231313231323131323132322331323331333132313331323222212   >>