C1111233131211111211113313331333133313331311211331333133313233223331   >>    C111123313121111121111331333133313331333131121133133313331323322333   <<    C1111233131211111211113313331333133313331311211331333133313233223333   >>      C1111233131211111211113313331333133313331311211331333133313233223332   >>