Grandma's recipes are full of the short form tsp, and her granddaughter can't read them. Write spell_out(recipe) to change every tsp into teaspoon. With no tsp, return the recipe unchanged.
spell_out("1 tsp salt")→'1 teaspoon salt'spell_out("2 tsp sugar, 1 tsp oil")→'2 teaspoon sugar, 1 teaspoon oil'def spell_out(recipe):
# your code here: use replace to swap tsp for teaspoon, and return it
return recipe
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