C31231211113313121211113313331333133313331213331312111112323223313221221   >>    C3123121111331312121111331333133313331333121333131211111232322331322122   <<    C31231211113313121211113313331333133313331213331312111112323223313221223   >>      C31231211113313121211113313331333133313331213331312111112323223313221222   >>