Problem:
Score : 200 points

Problem Statement

Given are two strings S and T.

Let us change some of the characters in S so that T will be a substring of S.

At least how many characters do we need to change?

Here, a substring is a consecutive subsequence. For example, xxx is a substring of yxxxy, but not a substring of xxyxx.

Constraints

The lengths of S and T are each at least 1 and at most 1000.

The length of T is at most that of S.

S and T consist of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S
T

Output

Print the minimum number of characters in S that need to be changed.

Sample Input 1

cabacc
abc

Sample Output 1

1

For example, changing the fourth character a in S to c will match the second through fourth characters in S to T.

Since S itself does not have T as its substring, this number of changes - one - is the minimum needed.

Sample Input 2

codeforces
atcoder

Sample Output 2

6

Solution in C (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>
int main(void){
	char s[1001] = { '\0' };
	char t[1001] = { '\0' };
	int l_s = 0;
	int l_t = 0;
	int max_match = 0;
	scanf("%s", s);
	scanf("%s", t);
	while(s[l_s] != '\0'){
		l_s++;
	}
	while(t[l_t] != '\0'){
		l_t++;
	}
	for(int i=0; i<l_s - l_t + 1; i++){
		int match = 0;
		for(int j=0; j<l_t; j++){
			if(s[i+j] == t[j]){
				match++;
			}
		}
		if(match>max_match){
			max_match = match;
		}
	}
	printf("%d\n", l_t-max_match);
	return 0;
}