C312312111133131212111133133313331323133313233121111331333133322112331333221221   >>    C31231211113313121211113313331333132313331323312111133133313332211233133322122   <<    C312312111133131212111133133313331323133313233121111331333133322112331333221223   >>      C312312111133131212111133133313331323133313233121111331333133322112331333221222   >>