# Given 3 int values, a b c, return their sum. # However, if any of the values is a teen -- in the range 13..19 inclusive -- # then that value counts as 0, except 15 and 16 do not count as a teens. # ...
# Given a string, return a new string where "not " has been added to the front. # However, if the string already begins with "not", return the string unchanged.
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