//Edit Distance Bottom-Up
//https://www.spoj.com/problems/EDIST/
#include <bits/stdc++.h>
using namespace std;

int main(){
    int n;
    ios_base::sync_with_stdio(false);
    cin >> n;
    while(n--){
        string a, b;
        cin >> a >> b;
        vector<vector<int> > mat(a.size()+1, vector<int>(b.size()+1));
        for(int i = 1; i <= a.size(); ++i){
            mat[i][0] = i;
        }
        for(int i = 1; i <= b.size(); ++i){
            mat[0][i] = i;
        }
        for(int i = 1; i <= a.size(); ++i){
            for(int j = 1; j <= b.size(); ++j){
                if(a[i-1] == b[j-1]){
                    mat[i][j] = mat[i-1][j-1];
                }
                else mat[i][j] = min(mat[i-1][j-1], min(mat[i][j-1], mat[i-1][j])) + 1;
            }
        }
        cout << mat[a.size()][b.size()] << '\n';
    }
}