#include <iostream>
using namespace std;
#define ll long long
int main() {
// your code goes here
ll t;
cin >> t;
for(ll i=0; i<t; i++) {
ll l,r;
cin >> l >>r;
ll count=0;
for(ll j=l; j<=r; j++) {
if(j%10==2 || j%10==3 || j%10==9)
{
count++;
}
}
cout << count << endl;
}
return 0;
}
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