You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "greatest_common_divisor", "description": "Computes the greatest common divisor (GCD) of two non-negative integers.", "parameters": {"a": {"description": "The first non-negative integer.", "type": "int"}, "b": {"description": "The second non-negative integer.", "type": "int"}}}]
In a coding interview, the candidate is asked to find the greatest common divisor of 81 and 135, and also of 144 and 256. What are the answers to these questions?
user
assistant
[{"name": "greatest_common_divisor", "arguments": {"a": 81, "b": 135}}, {"name": "greatest_common_divisor", "arguments": {"a": 144, "b": 256}}]