S = list(input())
from collections import defaultdict
d = defaultdict(lambda:0)
ans = 0
from collections import deque
v = deque()
v.append(tuple(S))
def candidate(X):
    T = list(X)
    tmp = []
    n = len(T)
    for i in range(n-1):
        a = T[:]
        a[i],a[i+1] = a[i+1],a[i]
        tmp.append(tuple(a))
    return tmp
ans = 0
d[tuple(S)] = 1
while v:
    x = v.popleft()
    for ix in candidate(x):
        if d[ix]==0:
            d[ix] = 1
            ans += 1
            v.append(ix)
print(ans)