def find_all_indexes(input_str, search_str):
	"""
	Searches for substring/character in input_str
	:param input_str: String in which to search substring
	:param search_str: Substring to be searched
	:return: Indexes of all substring matching position
	"""
	l1 = []
	length = len(input_str)
	index = 0
	while index < length:
		i = input_str.find(search_str, index)
		if i == -1:
			return l1
		l1.append(i)
		index = i + 1
	return l1