We are given a string:
CUBAEDEDABEBBAUCDBCADB
First, remove all the letters A from the string:
Original: CUBAEDEDABEBBAUCDBCADB
After removing 'A': CUBEDEDBEBBUCDBCDB
Now count the letters and find the 11th from the left:
1. C
2. U
3. B
4. E
5. D
6. E
7. D
8. B
9. E
10. B
11. U
So, the 11th character is U.
Answer: \(\boxed{U}\)