C1111233131211111211113313231333133313331323331323211232313223311   >>    C111123313121111121111331323133313331333132333132321123231322331   <<    C1111233131211111211113313231333133313331323331323211232313223313   >>      C1111233131211111211113313231333133313331323331323211232313223312   >>