C22212323232133313113313331333132313331323133313333223132232321   >>    C2221232323213331311331333133313231333132313331333322313223232   <<    C22212323232133313113313331333132313331323133313333223132232323   >>      C22212323232133313113313331333132313331323133313333223132232322   >>