C312312111133113313231333133313331333133313331333131133132313211   >>    C31231211113311331323133313331333133313331333133313113313231321   <<    C312312111133113313231333133313331333133313331333131133132313213   >>      C312312111133113313231333133313331333133313331333131133132313212   >>