C12121321333132233131333131133131211113313113313113313231322123121   >>    C1212132133313223313133313113313121111331311331311331323132212312   <<    C12121321333132233131333131133131211113313113313113313231322123123   >>      C12121321333132233131333131133131211113313113313113313231322123122   >>