import java.util.Scanner;
public class Main {
	public static void main(String[] args){
		
		Scanner in = new java.util.Scanner(System.in);
		char[] S = in.next().toCharArray();
		char[] T = in.next().toCharArray();
		int min = T.length;
		int diff;
		for(int i=0; i<=S.length-T.length; i++) {
			diff = 0;
			for(int j=0; j<T.length; j++) {
				if(S[i+j] != T[j]) {
					diff++;
				}
			}
			if(min > diff) {
				min = diff;
			}
		}
		
		System.out.println(min);
		
		
		in.close();
	}
}

/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