C22121333132313311211113313331333133313231333133313231323123121   >>    C2212133313231331121111331333133313331323133313331323132312312   <<    C22121333132313311211113313331333133313231333133313231323123123   >>      C22121333132313311211113313331333133313231333133313231323123122   >>