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: Wrong Answer)

/* exB */

#include<stdio.h>
#include<string.h>
#define SIZE 1001

int main(void){
    char s[SIZE], t[SIZE];
    int i, j, len_s, len_t, count, min = 1000;

    scanf("%s", s);
    scanf("%s", t);
    len_s = strlen(s);
    len_t = strlen(t);

    for(i=0; i<len_s-len_t; i++){
        count = 0;
        for(j=0; j<len_t; j++){
            if(s[i+j] != t[j]){
                count++;
            }
        }
        if(min > count){
            min = count;
        }
    }

    printf("%d\n", min);
}