# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = input()
	N = len(S)
	ans = 0
	pre1 = 0
	pre2 = INF
	for i in range(N - 2):
		if S[i] == "c" and S[i + 1] == "c" and S[i + 2] == "w":
			pre1 = i + 1
			pre2 = min(pre2, N - i - 2)

	ans = min(pre1, pre2)
	print(ans)


if __name__ == '__main__':
	main()