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q = int(input())
for i in range(q):
	cn = list(map(int, input().split()))
	n = cn[0]
	k = cn[1]
	l = list(map(str, input().split()))
	a = l.count('H')
	b = l.count('T')
	while (k > 0):
	  if l[-1] == 'T':
		b = b - 1
		k = k - 1
		else :
		  a = a - 1
		k = k - 1
		a, b = b, a
		l.pop()
	print(l.count('H'))

Traceback (most recent call last):
  File "/usr/lib/python3.7/py_compile.py", line 143, in compile
    _optimize=optimize)
  File "<frozen importlib._bootstrap_external>", line 791, in source_to_code
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "./prog.py", line 11
    b = b - 1
            ^
TabError: inconsistent use of tabs and spaces in indentation

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3.7/py_compile.py", line 147, in compile
    raise py_exc
py_compile.PyCompileError: Sorry: TabError: inconsistent use of tabs and spaces in indentation (prog.py, line 11)

Standard output is empty