C2221333133313331311233132313331333133313331333133313331333133323221321   >>    C222133313331333131123313231333133313331333133313331333133313332322132   <<    C2221333133313331311233132313331333133313331333133313331333133323221323   >>      C2221333133313331311233132313331333133313331333133313331333133323221322   >>