C1111233131211111211113313331323133313231121211113313331333232133313311   >>    C111123313121111121111331333132313331323112121111331333133323213331331   <<    C1111233131211111211113313331323133313231121211113313331333232133313313   >>      C1111233131211111211113313331323133313231121211113313331333232133313312   >>