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 Kotlin (1.3.71) (judge verdict: Wrong Answer)

import kotlin.math.min

fun main() {
    val s = readLn()
    val t = readLn()
    var ans = Int.MAX_VALUE
    for (i in s.indices) {
        if (i + t.length >= s.length) break
        var change = 0
        for (j in t.indices) {
            if (s[i + j] != t[j]) change++
        }
        ans = min(ans, change)
    }
    println(ans)
}

// Input Reader
private fun readLn() = readLine()!!