C22212323232133313113313331333133313231323132222123121213113121   >>    C2221232323213331311331333133313331323132313222212312121311312   <<    C22212323232133313113313331333133313231323132222123121213113123   >>      C22212323232133313113313331333133313231323132222123121213113122   >>