<s>
Locks-and-keys	B-Language
is	O
a	O
solution	O
to	O
dangling	B-Error_Name
pointers	I-Error_Name
in	O
computer	O
programming	O
languages	O
.	O
</s>
<s>
The	O
locks-and-keys	B-Language
approach	O
represents	O
pointers	O
as	O
ordered	O
pairs	O
(	O
key	O
,	O
address	O
)	O
where	O
the	O
key	O
is	O
an	O
integer	O
value	O
.	O
</s>
