Background: Often 'b' & 'p' are interchangeable, for example 'baggage' becomes 'pagas', 'lob' (to throw) becomes 'loopima'. The initial letter 's' is often dropped, for example 'skool' becomes 'kool', 'stool' becomes 'tool'.
Question: What two letters can be replaced with each other a lot of the time in Estonian?
Answer:<extra_id_0>.
<extra_id_0> 'b' & 'p'<extra_id_1>