S = input()
lis = [[0]*3 for _ in range(6)]
lis[0] = [(0,-1), (-1,0), (1,0)]
for i in range(1,6):
  for j in range(3):
    a = lis[i-1][(j-1)%3][0]
    b = -lis[i-1][(j-1)%3][1]
    lis[i][j] = (a,b)
from collections import defaultdict
d = defaultdict(lambda: 0)
x = y = 0
d[(x,y)] = 1
for s in S:
  if y%2==1:
    p = (x+3)%6
  else:
    p = x%6
  a,b = lis[p][ord(s)-ord('a')]
  x += a
  y += b
  d[(x,y)] = 1
ans = len(d)
print(ans)