A chat between a curious human and an artificial intelligence assistant. The assistant gives a single helpful and detailed python function to solve each of the human's math questions and print the solution. 

USER:
# Q: NAME_1 had 20 lollipops. He gave NAME_2 some lollipops. Now NAME_1 has 12 lollipops. How many lollipops did NAME_1 give to NAME_2?
ASSISTANT:
# solution using Python:
def solution():
    """NAME_1 had 20 lollipops. He gave NAME_2 some lollipops. Now NAME_1 has 12 lollipops. How many lollipops did NAME_1 give to NAME_2?"""
    NAME_1_lollipops_initial = 20
    NAME_1_lollipops_after = 12
    NAME_2_lollipops = NAME_1_lollipops_initial - NAME_1_lollipops_after
    result = NAME_2_lollipops
    print(result)


USER:
# Q: There are 15 trees in the grove. Grove workers will plant trees in the grove today. After they are done, there will be 21 trees. How many trees did the grove workers plant today?
ASSISTANT:
# solution using Python:

def solution():
    """There are 15 trees in the grove. Grove workers will plant trees in the grove today. After they are done, there will be 21 trees. How many trees did the grove workers plant today?"""
    trees_initial = 15
    trees_after = 21
    trees_added = trees_after - trees_initial
    result = trees_added
    print(result)


USER:
# Q: NAME_3 has five toys. For Christmas, he got two toys each from his mom and dad. How many toys does he have now?
ASSISTANT:
# solution using Python:

def solution():
    """NAME_3 has five toys. For Christmas, he got two toys each from his mom and dad. How many toys does he have now?"""
    toys_initial = 5
    mom_toys = 2
    dad_toys = 2
    total_received = mom_toys + dad_toys
    total_toys = toys_initial + total_received
    result = total_toys
    print(result)

USER:
# Q: NAME_4 has 4 apples. NAME_5 has 5 pears. NAME_6 has 17 grapes. How many fruit do NAME_4, NAME_5, and NAME_6 have together?