class Solution:
def minimumLength(self, s: str) -> int:
c = Counter(s)
def removals(n):
if n >= 3:
if n % 2 == 0 :
return n - 2
return n - 1
return 0
total = 0
for e in c:
x = c.get(e)
total += removals(x)
return len(s) - total