Get unique smallest string from the list

string_classifier.py

class StringClassifier:
    def __init__(self, input_data: list):
        self.input_list = input_data
        self.input_dict = dict(enumerate(input_data))
        self.sorted_dict = dict(enumerate(list(map(lambda x: "".join(sorted(x)), input_data))))

    def process(self) -> list:
        reverse_dict = {}
        processed_list = []
        for key, value in self.sorted_dict.items():
            reverse_dict.setdefault(value, set()).add(key)

        for key, victims in reverse_dict.items():
            victim_list = list(filter(lambda x: self.input_list.index(x) in victims, self.input_list))
            processed_list.append(min(victim_list))
        return processed_list


def test_1():
    test_data = ['aieou', 'uioae', 'doce', 'aaaa', 'aeiou', 'code', 'edoc', 'aaaaaa', 'aaaa', 'bbb', 'c']
    string_classifier = StringClassifier(input_data = test_data)
    assert ['aeiou', 'code', 'aaaa', 'aaaaaa', 'bbb', 'c'] == string_classifier.process()