C1111233131211111211113313331333133313232212111133132313331211232111   >>    C111123313121111121111331333133313331323221211113313231333121123211   <<    C1111233131211111211113313331333133313232212111133132313331211232113   >>      C1111233131211111211113313331333133313232212111133132313331211232112   >>