C1111233131211111211113313331333133313331322322331312111112213113313223323131   >>    C111123313121111121111331333133313331333132232233131211111221311331322332313   <<    C1111233131211111211113313331333133313331322322331312111112213113313223323133   >>      C1111233131211111211113313331333133313331322322331312111112213113313223323132   >>