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 Ruby (2.7.1) (judge verdict: Wrong Answer)

s=gets.chomp.split("").map(&:to_s)
v=gets.chomp.split("").map(&:to_s)

count=Array.new(v.length){0}
for i in 0..(s.length-v.length-1)
    vv=s[i..i+v.length]
    
    check=0
    for j in 0..vv.length-1
        if vv[j]==v[j]
            check+=1
        end
        
    end
    count[i]=check
  
end
p v.length-count.max