C13112133313331323321333133313331333133313331323133313112221313331   >>    C1311213331333132332133313331333133313331333132313331311222131333   <<    C13112133313331323321333133313331333133313331323133313112221313333   >>      C13112133313331323321333133313331333133313331323133313112221313332   >>