Generate a computer program to remove all 'a' from a string
Here is a simple program in Python that removes all occurrences of the letter 'a' from a string:

```python
input_str = 'abcabcabc'

# Using the replace() method to remove all occurrences of the letter 'a'
result_str = input_str.replace('a', '')

# Printing the result
print(result_str)
```

Output:
```
bcbcbc
```
abcabcabc
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Generate a computer program to remove all 'a' from a string

### Input:
abcabcabc

### Response:
Here is a simple program in Python that removes all occurrences of the letter 'a' from a string:

```python
input_str = 'abcabcabc'

# Using the replace() method to remove all occurrences of the letter 'a'
result_str = input_str.replace('a', '')

# Printing the result
print(result_str)
```

Output:
```
bcbcbc
```