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 Scala (2.13.1) (judge verdict: Accepted)

import scala.io.StdIn._
import scala.math._

object Main extends App with StdInHelper {
  val s = readLine()
  val t = readLine()

  var count = t.length
  for (i <- 0 to s.length - t.length) {
    val ss = s.substring(i, i + t.length)
    var c = 0
    for (i <- 0 to t.length - 1) {
      if (ss.charAt(i) != t.charAt(i)) {
        c += 1
      }
    }
    if (c < count) {
      count = c
    }
  }

  println(count)
}

trait StdInHelper {
  def readStrings = readLine.split(" ")
  def readInts = readStrings.map(_.toInt)
  def readLongs = readStrings.map(_.toLong)
  def readDoubles = readStrings.map(_.toDouble)
  def readBigInts = readStrings.map(BigInt.apply(_))
  def readBigDecimals = readStrings.map(BigDecimal.apply(_))
}