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Please note current limitations of the algorithm:

• First found sequence is accepted, i.e. there might be better or more common ways of typing something on given keyboard.
• It is greedy, i.e. if you have keys K, KA and AH, typing KAH will be deemed impossible as the KA key will be used and there is no H key.
• It does not consider edits, i.e. it will claim A is impossible to type in the previous example, even though you could use AH and backspace.
• It does not combine dead keys with ligatures, i.e. if you had ˇ + C = Č rule and there were only ˇ and CE keys, typing ČE would be deemed impossible.
• It does not consider normalization equivalence, i.e. composite Ó cannot by typed using O and combining acute, either as a ligature or as separate keys.