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"
	"math"
)

func main() {
	var s, t string
	fmt.Scanf("%s", &s)
	fmt.Scanf("%s", &t)

	length := len(t)
	var count int
	result := float64(math.MaxInt32)
	for i := 0; i < len(s)-length+1; i++ {
		str := s[i : i+length]
		for i, v := range str {
			if string(v) != string(t[i]) {
				count++
			}
		}
		result = math.Min(result, float64(count))
		count = 0
	}
	fmt.Println(int(result))
}