import std.stdio, std.string, std.conv, std.range;
import std.algorithm, std.array, std.typecons, std.container;
import std.math, std.numeric, std.random, core.bitop;

enum inf = 1_001_001_001;
enum infl = 1_001_001_001_001_001_001L;
enum mod = 1_000_000_007L;


void main() {
    int q;
    scan(q);

    while (q--) {
        string s, t;
        scan(s);
        scan(t);
        auto ans = solve(s, t);
        writeln(ans);
    }
}

int solve(string s, string t) {
    auto n = s.length.to!int;
    auto m = t.length.to!int;

    auto dp = new int[][](n + 1, m + 1);
    foreach (i ; 1 .. n + 1) {
        foreach (j ; 1 .. m + 1) {
            dp[i][j] = max(dp[i - 1][j], dp[i][j - 1]);
            if (s[i - 1] == t[j - 1]) chmax(dp[i][j], dp[i - 1][j - 1] + 1);
        }
    }

    auto res = dp[n][m];
    return res;
}

















void scan(T...)(ref T args) {
    import std.stdio : readln;
    import std.algorithm : splitter;
    import std.conv : to;
    import std.range.primitives;

    auto line = readln().splitter();
    foreach (ref arg; args) {
        arg = line.front.to!(typeof(arg));
        line.popFront();
    }
    assert(line.empty);
}

void fillAll(R, T)(ref R arr, T value) {
    static if (is(typeof(arr[] = value))) {
        arr[] = value;
    }
    else {
        foreach (ref e; arr) {
            fillAll(e, value);
        }
    }
}

bool chmin(T, U...)(ref T x, U args) {
    bool isChanged;

    foreach (arg; args) {
        if (x > arg) {
            x = arg;
            isChanged = true;
        }
    }

    return isChanged;
}

bool chmax(T, U...)(ref T x, U args) {
    bool isChanged;

    foreach (arg; args) {
        if (x < arg) {
            x = arg;
            isChanged = true;
        }
    }

    return isChanged;
}

