def pary(s):
ile = 0
for i in range(len(s) - 1):
if s[i] == s[i + 1]:
ile += 1
return ile
print(pary("TTAT"))
print(pary("TTTA"))
print(pary("TATA"))
print(pary("TGATTCTGAACAAGTGTT"))
print(pary("TGATATCGATGTGAAAAAGTCATACTGTT"))
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