C1111233131211111211113313331333133313331333133313331311331323133313211   >>    C111123313121111121111331333133313331333133313331333131133132313331321   <<    C1111233131211111211113313331333133313331333133313331311331323133313213   >>      C1111233131211111211113313331333133313331333133313331311331323133313212   >>