C12121321333132233131333131133131211113313113313113313231333133313222121   >>    C1212132133313223313133313113313121111331311331311331323133313331322212   <<    C12121321333132233131333131133131211113313113313113313231333133313222123   >>      C12121321333132233131333131133131211113313113313113313231333133313222122   >>