C22212323232133313113313331333132313231333132212132311133311211   >>    C2221232323213331311331333133313231323133313221213231113331121   <<    C22212323232133313113313331333132313231333132212132311133311213   >>      C22212323232133313113313331333132313231333132212132311133311212   >>