C22212323232133313113313331333133313231323132222123121123232211   >>    C2221232323213331311331333133313331323132313222212312112323221   <<    C22212323232133313113313331333133313231323132222123121123232213   >>      C22212323232133313113313331333133313231323132222123121123232212   >>