word = 'cww'
S = raw_input()
min = len(S)+1
for i in range(0, len(S)):
	flag = 0
	cnt = 0
	for j in range(i, len(S)):
		if S[j] == word[flag]: flag += 1
		if flag != 0: cnt += 1
		if flag == 3:
			if cnt < min: min = cnt
			break
print min