C1111233131211111211113313331333133313331333133313331333133313233311223231   >>    C111123313121111121111331333133313331333133313331333133313331323331122323   <<    C1111233131211111211113313331333133313331333133313331333133313233311223233   >>      C1111233131211111211113313331333133313331333133313331333133313233311223232   >>