C22212323232133313113313331333132313331323133313133113133121233211   >>    C2221232323213331311331333133313231333132313331313311313312123321   <<    C22212323232133313113313331333132313331323133313133113133121233213   >>      C22212323232133313113313331333132313331323133313133113133121233212   >>