C1111233131211111211113313331333133313232212111133132313332211211   >>    C111123313121111121111331333133313331323221211113313231333221121   <<    C1111233131211111211113313331333133313232212111133132313332211213   >>      C1111233131211111211113313331333133313232212111133132313332211212   >>