You have to create a function that converts integer given as string into ASCII uppercase letters.
All ASCII characters have their numerical order in table. 
For example,
```
from ASCII table, character of number 65 is "A".
```
Numbers will be next to each other, So you have to split given number to two digit long integers.
For example, 
```
'658776' to [65, 87, 76] and then turn it into 'AWL'.
```
convert=lambda s:''.join(chr(int(s[i:i+2]))for i in range(0,len(s),2))
convert=lambda s:''.join(chr(int(s[i:i+2]))for i in range(0,len(s),2))