C1111233131211111211113313331333133313232313331333133313321133132313232332311   >>    C111123313121111121111331333133313331323231333133313331332113313231323233231   <<    C1111233131211111211113313331333133313232313331333133313321133132313232332313   >>      C1111233131211111211113313331333133313232313331333133313321133132313232332312   >>