C1111233133313231133133313331333133313211232213331323133313233331   >>    C111123313331323113313331333133313331321123221333132313331323333   <<    C1111233133313231133133313331333133313211232213331323133313233333   >>      C1111233133313231133133313331333133313211232213331323133313233332   >>