C1111233131211111211113313231333133313331323221211113313311223223311   >>    C111123313121111121111331323133313331333132322121111331331122322331   <<    C1111233131211111211113313231333133313331323221211113313311223223313   >>      C1111233131211111211113313231333133313331323221211113313311223223312   >>