Untitled

#include <iostream>
#include <vector>
using namespace std;

// Function to check if a number is a Champ Number
bool isChampNumber(long long num) {
    bool digits[6] = {false}; // digits array to check uniqueness
    
    while (num) {
        int digit = num % 10;
        
        // If digit is greater than 5 or already occurred, return false
        if (digit > 5 || digits[digit]) {
            return false;
        }
        
        digits[digit] = true;
        num /= 10;
    }
    return true;
}

int main() {
    int Q;
    cin >> Q;
    
    for (int q = 0; q < Q; ++q) {
        long long X, Y;
        cin >> X >> Y;
        
        int count = 0;
        for (long long i = X; i <= Y; ++i) {
            if (isChampNumber(i)) {
                count++;
            }
        }
        
        cout << count << endl;
    }
    return 0;
}