public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
int tc = in.nextInt();
while (tc-- > 0) {
String a = in.nextString();
String b = in.nextString();
int[][] dp = new int[2][b.length() + 1];
dp[1][0] = 1;
for (int i = 0; i <= b.length(); i++) {
dp[0][i] = i;
}
for (int i = 1, r = a.length(); i <= r; i++) {
dp[i % 2][0] = i;
for (int j = 1, c = b.length(); j <= c; j++) {
if (a.charAt(i - 1) == b.charAt(j - 1)) {
dp[i % 2][j] = dp[(i - 1) % 2][j - 1];
} else {
dp[i % 2][j] = 1 + min(dp[(i - 1) % 2][j], dp[(i - 1) % 2][j - 1], dp[i % 2][j - 1]);
}
}
}
out.println(dp[a.length() % 2][b.length()]);
}
out.flush();
out.close();
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
Solver solver = new Solver(in, out);
solver.solve();
in.close();
out.flush();
out.close();
}
public static void main(String[] args) {
in = new InputReader(System.in);
out = new OutputWriter(System.out);
solve();
out.flush();
in.close();
out.close();
}
public static void main(String[] argv) throws IOException
{
Task t;
boolean home = argv.length > 0 && argv[0].equals("test");
InputStream inputStream;
OutputStream outputStream;
if (home) {
inputStream = new FileInputStream(Task.filename + ".in");
outputStream = new FileOutputStream(Task.filename + ".out");
} else {
switch (Task.read) {
case 0:
inputStream = new FileInputStream(Task.filename + ".in");
outputStream = new FileOutputStream(Task.filename + ".out");
break;
case 1:
inputStream = new FileInputStream("input.txt");
outputStream = new FileOutputStream("output.txt");
break;
default:
inputStream = System.in;
outputStream = System.out;
break;
}
}
InputReader in = new InputReader(inputStream);
OutputWriter out = new OutputWriter(outputStream, home);
if (home)
do {
long time = System.currentTimeMillis();
t = new Task();
t.in = in;
t.out = out;
t.run();
out.writeln();
out.writeln("=====Time:" + (System.currentTimeMillis() - time));
out.flush();
} while (in.toNextTest());
else {
t = new Task();
t.in = in;
t.out = out;
t.run();
}
out.close();
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
int tc = in.nextInt();
while (tc-- > 0) {
int n = in.nextInt();
out.println(countTri(n));
}
out.flush();
out.close();
}
public static void main(String[] args) throws IOException {
// InputStream inputStream = new FileInputStream("replaceme.in");
// OutputStream outputStream = new FileOutputStream("replaceme.out");
/////////////////////////////////////////////////////////////////////
InputStream inputStream = System.in;
OutputStream outputStream = System.out;
InputReader in = new InputReader(inputStream);
OutputWriter out = new OutputWriter(outputStream);
Task solver = new Task();
solver.solve(1, in, out);
out.close();
System.exit(0);
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
while (true) {
int n = in.nextInt();
if (n == 0) break;
int c = 0;
while (n > 1) {
n /= 2;
c++;
}
out.println(c);
}
out.flush();
out.close();
}