Here is a set of basic questions producing integer or string outputs. Answer them and format the result precisely with the JSON instructions provided:

Question 0 (Question id: q_iHBaJ64i):
Your job is to return the last character of a string as a string. For example, the last char of "hello" is "o". Return the last character of the following string: "or"

Question 1 (Question id: q_2TFBk):
Calculate -6 + 7.

Question 2 (Question id: q_a5g1):
Your task is to count how many legs there are in total when given a list of animals.

Now, how many legs are there in total if you have 4 butterflys, 3 insects, 2 chickens, 2 deers?
 Respond with an integer.

Question 3 (Question id: q_rReiCAO):
Your task is to count how many legs there are in total when given a list of animals.

Now, how many legs are there in total if you have 1 wasp, 2 tigers, 2 fireflys, 2 leechs, 4 birds?
 Respond with an integer.



Your output must be a JSON mapping every question id to its answer info.

The value for each key should be an object that contains the answer in the field 'answer'. If a question involves animal-leg or letter counting, include 'task_type' set to 'leg_counting' or 'letter_counting'.
If the response to a question is an integer that is even, also add the field 'half_answer' to the object which contains the answer integer divided by two.
For string answers, include 'first_char' with the answer’s initial letter.
If the question asks for the last character of a string, add an 'original_string' field containing the source string.
For animal-leg questions, add 'animal_types': an alphabetically-sorted list of unique animal names in singular form.

Now provide the result JSON using the described format.

{"ground_truth": {"q_iHBaJ64i": {"answer": "r", "first_char": "r", "original_string": "or"}, "q_2TFBk": {"answer": 1}, "q_a5g1": {"answer": 54, "task_type": "leg_counting", "half_answer": 27, "animal_types": ["butterfly", "chicken", "deer", "insect"]}, "q_rReiCAO": {"answer": 34, "task_type": "leg_counting", "half_answer": 17, "animal_types": ["bird", "firefly", "leech", "tiger", "wasp"]}}}