import java.io.*;
import java.util.*;

class Main {
 	public static void main(String args[]) throws IOException {
     	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      	String S = br.readLine();
      	String T = br.readLine();
      	int size = T.length();
      	int ans = Integer.MAX_VALUE;
      	for(int i=0;i<=S.length()-size;i++) {
          	int tmp = i;
          	int count = 0;
         	for(int j=0;j<T.length();j++,i++) {
             	 if(S.charAt(i) != T.charAt(j))
                    count++;
            }
            if(count < ans)
            	ans = count;
          	i = tmp;
        }
        System.out.println(ans);
    }
}
/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