CodeChef::NUM239

 

#include <bits/stdc++.h>
using namespace std ;

int main (){
    int t ;
    cin >> t ;
    while (t--){
        int left ;
        int right ;
        cin >> left >> right ;
        int full_array[right - left + 1] ;
        for (int i = 0; i < right - left + 1; ++i) {
            full_array[i] = i + left;
        }
        int count {0};
        for (int i = 0; i < right - left + 1; ++i) {
            if (full_array[i] % 10 == 2 or full_array[i] % 10 == 3 or full_array[i] % 10 == 9){
                count ++ ;
            }
        }
        cout << count << '\n';
    }
    return 0 ;
}