# Length of the longest supported key (number of strokes).
LONGEST_KEY = 1

# Lookup function: return the translation for <key> (a tuple of strokes)
# or raise KeyError if no translation is available/possible.
def lookup(key):
    assert len(key) <= LONGEST_KEY
    raise KeyError

# Optional: return an array of stroke tuples that would translate back
# to <text> (an empty array if not possible).
def reverse_lookup(text):
    return []

LONGEST_KEY = 2

SHOW_STROKE_STENO = 'STR*'

def lookup(key):
    assert len(key) <= LONGEST_KEY, '%d/%d' % (len(key), LONGEST_KEY)
    if SHOW_STROKE_STENO != key[0]:
        raise KeyError
    if len(key) == 1:
        return ' '
    return key[1]