seq = input()
n = len(seq)

ans1 = 0
for i in range(n):
    if "ccw" not in seq[i:]:
        ans1 = i
        break
ans2=0        
for i in range(1, n):
    if "ccw" not in seq[:(-1)*(i)]:
        ans2 = i
        break
ans = min(ans1, ans2)
print(ans)