C22212323232133313113313331333132313331311332313233232231121311   >>    C2221232323213331311331333133313231333131133231323323223112131   <<    C22212323232133313113313331333132313331311332313233232231121313   >>      C22212323232133313113313331333132313331311332313233232231121312   >>