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();
		char[] s = S.toCharArray();
		char[] t = T.toCharArray();
		int slen = s.length;
		int tlen = t.length;
		
		//答えansを仮置きする。
		//これが十分に大きくないと不正解となるので、
		//この値なら絶対に正しい答えが出る、という値を仮置きすること
		int ans = tlen;
		
		for(int start = 0; start <= slen-tlen; start++){
			int diff = 0;
			for(int i = 0; i < tlen; i++){
				if(t[i] != s[start+i]){
					diff++;
				}
			}
			ans = Math.min(ans, diff);
		}
		
		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