C131121333133313233213331333133313331333133331211113313331322223313231333221   >>    C13112133313331323321333133313331333133313333121111331333132222331323133322   <<    C131121333133313233213331333133313331333133331211113313331322223313231333223   >>      C131121333133313233213331333133313331333133331211113313331322223313231333222   >>