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 Rust (1.42.0) (judge verdict: Accepted)

use proconio::*;

fn main() {
    input! {s: String, t: String}
    let (s, t) : (String, String) = (s, t);
    let (s_chars, t_chars): (Vec<char>,Vec<char>) = (s.chars().collect(), t.chars().collect());
    let mut max = 0;
    let mut count = 0;
    for i in 0.. s_chars.len() - t_chars.len() + 1 {
        for j in 0.. t_chars.len() {
            if s_chars[i+j] == t_chars[j] {
                count += 1;
            }             
        }
        if count > max { max = count; }
        count = 0;
    }
    println!("{}", t_chars.len() - max);
}