C13112133313331323321333133313331333133313331322331322331333132313221233131   >>    C1311213331333132332133313331333133313331333132233132233133313231322123313   <<    C13112133313331323321333133313331333133313331322331322331333132313221233133   >>      C13112133313331323321333133313331333133313331322331322331333132313221233132   >>