C22212323232133313113313331333132313331311332313233232232233221   >>    C2221232323213331311331333133313231333131133231323323223223322   <<    C22212323232133313113313331333132313331311332313233232232233223   >>      C22212323232133313113313331333132313331311332313233232232233222   >>