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": "find_majority_element", "description": "Finds the majority element in a list, which appears more than \u230an / 2\u230b times.", "parameters": {"nums": {"description": "The input list of integers.", "type": "List[int]"}}}, {"name": "find_first_non_repeating_char", "description": "Finds the first non-repeating character in a string.", "parameters": {"s": {"description": "The input string.", "type": "str"}}}, {"name": "find_missing_ranges", "description": "Finds the missing ranges between lower and upper in a sorted list of integers.", "parameters": {"nums": {"description": "The sorted list of integers.", "type": "List[int]"}, "lower": {"description": "The lower bound.", "type": "int"}, "upper": {"description": "The upper bound.", "type": "int"}}}, {"name": "is_valid_parentheses", "description": "Checks if a string contains valid parentheses.", "parameters": {"s": {"description": "The input string.", "type": "str"}}}]
Find the majority element in the list [1, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20] and identify the first non-repeating character in the string 'abcdefghijklmnopqrstuvwxyz' at the same time.
user
assistant
[{"name": "find_majority_element", "arguments": {"nums": [1, 2, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]}}, {"name": "find_first_non_repeating_char", "arguments": {"s": "abcdefghijklmnopqrstuvwxyz"}}]