#include <fstream>
using namespace std;
ifstream fin("nr_pal.in");
ofstream fout("nr_pal.out");
int n, a, b;
int ncif(int n);
int POW(int x, int n);
int ogl(int n);
int nrpal(int n);
int main()
{
    fin >> n;
    for (int i = 1; i <= n; ++i)
    {
        fin >> a >> b;
        fout << nrpal(b) - nrpal(a - 1) << '\n';
    }
    fin.close();
    fout.close();
    return 0;
}
int ncif(int n)
{
    int rez = 0;
    if (n == 0)
        return 1;
    while (n > 0)
    {
        n /= 10;
        ++rez;
    }
    return rez;
}
int POW(int x, int n)
{
    if (n == 0) return 1;
    int p = POW(x, n / 2);
    p *= p;
    if (n & 1)
        p *= x;
    return p;
}
int ogl(int n)
{
    int oglindit = 0;
    while (n > 0)
    {
        oglindit = oglindit * 10 + n % 10;
        n /= 10;
    }
    return oglindit;
}
int nrpal(int n)
{
    int c = ncif(n), npal = 1;
    if (c % 2 == 1)
    {
        npal += 2 * (POW(10, c / 2) - 1);
        int pal = n / POW(10, c / 2) * POW(10, c / 2) + ogl(n / POW(10, c / 2 + 1));
        if (n >= pal)
            npal += n / POW(10, c / 2) - POW(10, c / 2) + 1;
        else npal += n / POW(10, c / 2) - POW(10, c / 2);
    }
    else
    {
        npal += 2 * (POW(10, (c - 1) / 2) - 1) + 9 * POW(10, (c - 1) / 2);
        int pal = n / POW(10, c / 2) * POW(10, c / 2) + ogl(n / POW(10, c / 2));
        if (n >= pal)
            npal += n / POW(10, c / 2) - POW(10, c / 2 - 1) + 1;
        else npal += n / POW(10, c / 2) - POW(10, c / 2 - 1);
    }
    return npal;
}