#include <bits/stdc++.h>

using namespace std;

int gett(int l, int c)
{
	l -= c;
	if (l < 0) return 0;
	return (l / 10) + 1;
}    

int main() 
{
	vector<int> v = {2, 3, 9};
	int T;
	cin >> T;
	for (int i = 0; i < T; i++)
	{
		int l, r;
		cin >> l >> r;
		int ans = 0;
		for (int c : v)           
			ans += gett(r, c) - gett(l - 1, c);
		cout << ans << "\n";
	}
	return 0;
}