C1111233133313231133133313331333133313231232313331323133313121111112121   >>    C111123313331323113313331333133313331323123231333132313331312111111212   <<    C1111233133313231133133313331333133313231232313331323133313121111112123   >>      C1111233133313231133133313331333133313231232313331323133313121111112122   >>