C131121333133313233213331333133313331333132333133313331323212221   >>    C13112133313331323321333133313331333133313233313331333132321222   <<    C131121333133313233213331333133313331333132333133313331323212223   >>      C131121333133313233213331333133313331333132333133313331323212222   >>