Question: 
Write a function to convert tuple to a string.


Model's Code:
def tup_string(tup):
    return ''.join(tup)



Sample Correct Code:
def tup_string(tup1):
  str =  ''.join(tup1)
  return str


Asserts:
assert tup_string(('e', 'x', 'e', 'r', 'c', 'i', 's', 'e', 's'))==("exercises")
assert tup_string(('p','y','t','h','o','n'))==("python")
assert tup_string(('p','r','o','g','r','a','m'))==("program")


Tests:
Test 1 of 3: PASS
Test 2 of 3: PASS
Test 3 of 3: PASS

Test 132 of 974: 99/132 (75.0%): success