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 Go (1.14.1) (judge verdict: Accepted)

package main

import "fmt"

func main() {
	var s, t string
	fmt.Scan(&s, &t)
	ans := 10000

	for i := 0; i <= len(s)-len(t); i++ {
		c := 0
		for j := 0; j < len(t); j++ {
			if s[i+j] != t[j] {
				c++
			}
		}
		ans = min(ans, c)
	}
	fmt.Println(ans)
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}