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();
}
