import java.util.Scanner;

class Main {
  public static void main(String[] args) {
    final Scanner sc = new Scanner(System.in);
    final String s = sc.nextLine();
    final String t = sc.nextLine();
    int min_diff = s.length();

    for (int i = 0; i <= (s.length() - t.length()); i++) {
      int j = 0;
      int diff = 0;
      while (j < t.length()) {
        if (s.charAt(i + j) != t.charAt(j)) {
          diff++;
        }
        j++;
      }

      if (min_diff > diff) {
        min_diff = diff;
      }
    }

    System.out.println(min_diff);
  }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz