//#define NDEBUG
#pragma warning(disable : 4146)

#include <bits/stdc++.h>

namespace n91 {

  using i32 = std::int32_t;
  using i64 = std::int64_t;
  using u32 = std::uint32_t;
  using u64 = std::uint64_t;
  using isize = std::ptrdiff_t;
  using usize = std::size_t;
  using f64 = double;

  struct rep {
    struct itr {
      usize i;
      constexpr itr(const usize i) noexcept : i(i) {}
      void operator++() noexcept { ++i; }
      constexpr usize operator*() const noexcept { return i; }
      constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
    };
    const itr f, l;
    constexpr rep(const usize f, const usize l) noexcept
      : f(std::min(f, l)), l(l) {}
    constexpr auto begin() const noexcept { return f; }
    constexpr auto end() const noexcept { return l; }
  };
  struct revrep {
    struct itr {
      usize i;
      constexpr itr(const usize i) noexcept : i(i) {}
      void operator++() noexcept { --i; }
      constexpr usize operator*() const noexcept { return i; }
      constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
    };
    const itr f, l;
    constexpr revrep(const usize f, const usize l) noexcept
      : f(l - 1), l(std::min(f, l) - 1) {}
    constexpr auto begin() const noexcept { return f; }
    constexpr auto end() const noexcept { return l; }
  };
  template <class T> auto md_vec(const usize n, const T& value) {
    return std::vector<T>(n, value);
  }
  template <class... Args> auto md_vec(const usize n, Args... args) {
    return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
  }
  template <class T> constexpr T difference(const T& a, const T& b) noexcept {
    return a < b ? b - a : a - b;
  }
  template <class T> void chmin(T& a, const T& b) noexcept {
    if (b < a)
      a = b;
  }
  template <class T> void chmax(T& a, const T& b) noexcept {
    if (a < b)
      a = b;
  }
  template <class F> class rec_lambda {
    F f;

  public:
    rec_lambda(F&& f_) : f(std::forward<F>(f_)) {}
    template <class... Args> auto operator()(Args &&... args) const {
      return f(*this, std::forward<Args>(args)...);
    }
  };
  template <class T> T scan() {
    T ret;
    std::cin >> ret;
    return ret;
  }
  constexpr char eoln = '\n';

  i64 floor_div(const i64 n, const i64 d) {
    assert(d != 0);
    return n / d - static_cast<i64>((n ^ d) < 0 && n % d != 0);
  }

  i64 ceil_div(const i64 n, const i64 d) {
    assert(d != 0);
    return n / d + static_cast<i64>((n ^ d) >= 0 && n % d != 0);
  }

#ifdef N91_LOCAL
#define OJ_LOCAL(a, b) b
#else
#define OJ_LOCAL(a, b) a
#endif

} // namespace n91

namespace n91 {

  void solve() {
    const u64 x = scan<u64>();
    const u64 z = scan<u64>();

    std::array<std::array<std::array<u64, 3>, 2>, 2> dp = {};
    // c0, c1
    dp[1][0][1] = 1;
    u64 z_ = z, x_ = x;

    const auto op = [](const usize x) {
      const usize tp = x % 10;
      if (tp < 5)
        return x - tp;
      else
        return x - tp + 10;
      };

    while (z_ != 0 || x_ != 0) {
      const u32 zd = z_ % 10, xd = x_ % 10;
      z_ /= 10, x_ /= 10;

      decltype(dp) nx = {};
      for (const usize d : rep(0, 10)) {
        for (const usize c0 : rep(0, 2)) {
          for (const usize c1 : rep(0, 2)) {
            for (const usize h : rep(0, 3)) {
              const usize nh = d == zd ? h : d < zd ? 0 : 2;
              usize nc0 = 0, nc1 = 0;
              const auto test = [&](usize v) {
                if (v % 10 == xd) {
                  (v / 10 ? nc1 : nc0) = 1;
                }
                };
              if (c0) {
                test(d);
                test(op(d));
              }
              if (c1) {
                test(d + 1);
                test(op(d + 1));
                test(op(d) + 1);
                test(op(op(d) + 1));
              }
              nx[nc0][nc1][nh] += dp[c0][c1][h];
            }
          }
        }
      }

      dp = nx;
    }

    std::cout << dp[1][0][0] + dp[1][0][1] + dp[1][1][0] + dp[1][1][1] << eoln;
  }

  void main_() {
    const usize t = scan<usize>();
    for (const usize i : rep(0, t))
      solve();
  }

} // namespace n91

int main() {
  //*
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  //*/
  std::cout << std::fixed << std::setprecision(20);
  n91::main_();
  return 0;
}