#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <math.h>
#include <string.h>

int main()
{
	int c = -1;
	int w1 = -1;
	int w2 = -1;
	int strNum = 0;
	char str[100001] = "chiwaaaaaaamikawayadeeeeesu";

	scanf("%s", str);

	for (int i = 0;str[i] != '\0';i++)
	{
		if (str[i] == 'c' && c == -1)
		{
			c = i;
			break;
		}
	}

	for (int i = c + 1;str[i] != '\0';i++)
	{
		if (str[i] == 'w' && w1 == -1)
		{
			w1 = i;
			break;
		}
	}

	for (int i = w1 + 1;str[i] != '\0';i++)
	{
		if (str[i] == 'w' && w2 == -1)
		{
			w2 = i;
			break;
		}
	}

	strNum = w2 - c + 1;

	printf("%d\n", strNum );

	return 0;
}