import java.util.*;
public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      String S = sc.next();
      String T = sc.next();
      int min = 1000;
      int count;
      for(int i=0;i<S.length()-T.length()+1;i++){
        count = 0;
        for(int j=0;j<T.length();j++){
            if(S.charAt(j+i)!=T.charAt(j)){
              count++;
            }
        }
        min = Math.min(min,count);
      }
      if(S.equals(T)){
        min=0;
      }
      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