C131121333133313233213331333133313331333133313113313231333132213112221333321   >>    C13112133313331323321333133313331333133313331311331323133313221311222133332   <<    C131121333133313233213331333133313331333133313113313231333132213112221333323   >>      C131121333133313233213331333133313331333133313113313231333132213112221333322   >>