// yukicoder: No.436 ccw
// 2019.4.17 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#define pc(c) putchar_unlocked(c)
#else
#define gc() getchar()
#define pc(c) putchar(c)
#endif
int ins(char *s)
{
	char *p = s;
	do *s = gc();
	while (*s++ > ' ');
	*--s = 0;
	return s - p;
}

char S[100005], *p = S;

int main()
{
	int k, w, min;
	w = ins(S);
	while (*p == 'c') p++;
	if ((k = p-S) == 1) puts("0"); 
	else {
		min = w - k;
		if (k-1 < min) min = k-1;
	}
	printf("%d\n", min);
	return 0;
}