Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Which IPv6 address had a location of distributed using anycast 8/0 and a letter of A?

### Inputs:
table_name: table, columns: ['Letter', 'IPv6 address', 'AS-number', 'Operator', 'Location #sites (global/local)', 'Software']

### Response:
SELECT IPv6 address FROM table WHERE Location #sites (global/local) = distributed using anycast 8/0 AND Letter = a