def is_allowed_specific_char(string):
    import re
    
    get_char = re.compile(r'[^a-zA-Z0-9.]')
    string = get_char.search(string)
    return not bool(string)
def heap_queue_largest(nums,n):
  import heapq as hq
  
  largest_nums = hq.nlargest(n, nums)
  return largest_nums