Gianni and Paola (husband and wife) invited to the birthday party of Gianni 3 pairs of friends (each pair 'consists of husband and wife). Early in the evening there are the usual greetings with relatively narrow range of hands. After greeting, Gianni asks each participant how many hands shook. The answers you get are all different.
Question: how many hands shook Paola, the wife of Gianni
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