#include <bits/stdc++.h>
using namespace std;
const int Max = 1e6 + 10;
const int Mod = 1e9 + 7;
const long long int Inf = 1LL << 62;
int lf[Max];
int rt[Max];
int main() {
  int n, m, cnt = 0;
  string s, t;
  cin >> s >> t;
  n = s.size();
  m = t.size();
  s = "#" + s;
  t = "#" + t;
  for (int i = 1, j = 0; i <= m; i++) {
    if (t[i] == s[j + 1] && j < n) {
      j++;
    }
    if (j == n) {
      lf[i] = 1;
    }
  }
  for (int i = m, j = n + 1; i >= 1; i--) {
    if (t[i] == s[j - 1] && j > 1) {
      j--;
    }
    if (j == 1) {
      rt[i] = 1;
    }
  }
  for (int i = 1; i <= m; i++) {
    cnt += (lf[i] && rt[i + 1]);
  }
  cout << cnt << endl;
  return 0;
}
