I want to know a code which finds `the largest k cells and their locations`, when given `a two dimensional table`.

for example, the given two dimensional table is as follows,

```
table_ex

   A   B   C
F 99  693  515
I 722 583  37
M 186 817  525

```

the function, which is made by a desirable code, gives the result. 

```
function(table_ex, 2)

 817,  M B
 722,  I A

```

In the case described above, since k=2, the function gives two largest cells and their locations.