#include <bits/stdc++.h>
using namespace std;
int n, m, sum, ans;
int cnt[1000010], pre[1000010];
char a[1000010], b[1000010];
int main() {
  scanf("%s%s", a + 1, b + 1);
  n = strlen(a + 1);
  m = strlen(b + 1);
  for (int i = 1; i < n; i++)
    if (a[i] != a[i + 1]) cnt[i] = 1;
  for (int i = 1; i <= n; i++) pre[i] = pre[i - 1] + cnt[i];
  for (int i = 1; i <= m; i++) {
    if (a[i] != b[i]) sum++;
  }
  if (sum % 2 == 0) ans = 1;
  for (int i = m + 1; i <= n; i++) {
    sum += pre[i - 1] - pre[i - m - 1];
    if (sum % 2 == 0) ans++;
  }
  printf("%d\n", ans);
  return 0;
}
