#include <bits/stdc++.h>
using namespace std;
char a[200006];
char b[200006];
int main() {
  int n, m;
  int lena;
  int lenb;
  while (~scanf("%d%d", &n, &m)) {
    scanf("%s", a);
    scanf("%s", b);
    char c[200006];
    int lena = strlen(a);
    int lenb = strlen(b);
    if (lena > lenb + 1) {
      printf("NO\n");
    } else {
      int f = -1;
      for (int i = 0; i < lena; i++) {
        if (a[i] == '*') {
          f = i;
          for (int j = i + 1; j < lena; j++) {
            c[j - i - 1] = a[j];
          }
          c[lena - i - 1] = '\0';
          break;
        }
      }
      if (f == -1) {
        if (!strcmp(a, b)) {
          printf("YES\n");
          continue;
        } else {
          printf("NO\n");
          continue;
        }
      }
      int lenc = strlen(c);
      int flag = 0;
      for (int i = 0; i < f; i++) {
        if (a[i] != b[i]) {
          flag = 1;
          break;
        }
      }
      for (int i = lenb - 1; i >= lenb - lenc; i--) {
        if (b[i] != c[i - lenb + lenc]) {
          flag = 1;
          break;
        }
      }
      if (flag == 0)
        printf("YES\n");
      else
        printf("NO\n");
    }
  }
  return 0;
}
