C22212323232133313113313331333133313231323132222123323133322211   >>    C2221232323213331311331333133313331323132313222212332313332221   <<    C22212323232133313113313331333133313231323132222123323133322213   >>      C22212323232133313113313331333133313231323132222123323133322212   >>