import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String s = in.readLine();
		String t = in.readLine();
		int min = t.length();
		for (int i = 0; i <= s.length()-t.length(); i++) {
			int change = t.length();
			for (int j = 0; j < t.length(); j++) {
				if (t.charAt(j) == s.charAt(i+j))
					change--;
			}
			min = Math.min(change, min);
		}
		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