we can add a method to find key from value for  'a': ['á', 'à', 'â', 'ä', 'å', 'ã', 'ā', 'æ'], so the table will become more readable.
for example:
```python
test = {'a': ['á', 'à', 'â', 'ä', 'å', 'ã', 'ā', 'æ'], 'c': ['ç', 'ć', 'č']}
def find_key(input_value):
    for test_key, test_value in test.iteritems():
        for v in test_value:
            if v == input_value:
                print 'Find key:', test_key		
find_key('æ')
```