C22212323232133313113313331333132313231333132212132311221223311   >>    C2221232323213331311331333133313231323133313221213231122122331   <<    C22212323232133313113313331333132313231333132212132311221223313   >>      C22212323232133313113313331333132313231333132212132311221223312   >>