C22212323232133313113313331333132313331323133313133113133133213211   >>    C2221232323213331311331333133313231333132313331313311313313321321   <<    C22212323232133313113313331333132313331323133313133113133133213213   >>      C22212323232133313113313331333132313331323133313133113133133213212   >>