import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String s = sc.next();
    char[] ss = s.toCharArray();
    String t = sc.next();
    char[] tt = t.toCharArray();
    int difmin = 100000;
    for(int i = 0;i<=s.length()-t.length();i++){
      int dif = 0;
      for(int j = 0;j<t.length();j++){
        if(ss[i+j]!=tt[j])dif++;
      }
      difmin = Math.min(dif,difmin);
    }
    System.out.println(difmin);
  }
}

/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