C22212323232133313113313331333132313231333132313222132221323123121   >>    C2221232323213331311331333133313231323133313231322213222132312312   <<    C22212323232133313113313331333132313231333132313222132221323123123   >>      C22212323232133313113313331333132313231333132313222132221323123122   >>