C1111233131211111211113313231333133313331323331333132323132322121   >>    C111123313121111121111331323133313331333132333133313232313232212   <<    C1111233131211111211113313231333133313331323331333132323132322123   >>      C1111233131211111211113313231333133313331323331333132323132322122   >>