C1111233131211111211113313331333133313232212111133132313331211232132311   >>    C111123313121111121111331333133313331323221211113313231333121123213231   <<    C1111233131211111211113313331333133313232212111133132313331211232132313   >>      C1111233131211111211113313331333133313232212111133132313331211232132312   >>