C1111233133313231133133313231333133313113313113313331333133112233111121   >>    C111123313331323113313331323133313331311331311331333133313311223311112   <<    C1111233133313231133133313231333133313113313113313331333133112233111123   >>      C1111233133313231133133313231333133313113313113313331333133112233111122   >>