C1111233131211111211113313331333133313331312331333132112323221111   >>    C111123313121111121111331333133313331333131233133313211232322111   <<    C1111233131211111211113313331333133313331312331333132112323221113   >>      C1111233131211111211113313331333133313331312331333132112323221112   >>