import java.util.*;

public class Main {
    public static void main(String[] args) {
        try (Scanner sc = new Scanner(System.in)) {
            String S = sc.next();
            String T = sc.next();

            int cnt = 0, min = T.length();
            for (int i = 0; i <= S.length() - T.length(); i++) {
                cnt = 0;
                for (int j = 0; j < T.length(); j++) {
                    if (S.charAt(i + j) != T.charAt(j)) {
                        cnt++;
                    }
                }
                min = Math.min(cnt, min);
            }
            System.out.println(min);
        }
    }
}

/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