import re
N = input()
cnt = 0

if "ccw" in N:
    p = N.find("ccw")
    if p < len(N)//2:
        while "ccw" in N:
            N = re.sub("^(c|w)","",N)
            cnt += 1
    else:
        while "ccw" in N:
            N = re.sub("(c|w)$","",N)
            cnt += 1
        
print(cnt)