import java.util.Scanner;

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=10000;
		for(int i=0;i<(s.length()-t.length()+1);i++){
			String r=s.substring(i,i+t.length());
			int a=0;
			for(int k=0;k<t.length();k++){
				if(t.charAt(k)!=r.charAt(k)){a++;}
			}
			if(min>a){min=a;}
		}
		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