C12121321333132233131333131133131211113313113313113313231333132333221211   >>    C1212132133313223313133313113313121111331311331311331323133313233322121   <<    C12121321333132233131333131133131211113313113313113313231333132333221213   >>      C12121321333132233131333131133131211113313113313113313231333132333221212   >>