import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[] counts = new int[7];
        counts[0] = 1;
        while (n-- > 0) {
            int d = sc.nextInt() % 7;
            int length = sc.nextInt();
            int v = getLength(d, length);
            int w = pow(3, length);
            int[] current = new int[7];
            for (int i = 0; i < 7; i++) {
                int idx = (i * w + v) % 7;
                current[idx] += counts[i];
                current[idx] %= MOD;
            }
            for (int i = 0; i < 7; i++) {
                counts[i] += current[i];
                counts[i] %= MOD;
            }
        }
        long ans = 0;
        for (int i = 1; i < 7; i++) {
            ans += (long)i * counts[i] % MOD;
            ans %= MOD;
        }
        System.out.println(ans);
    }
    
    static int getLength(int d, int length) {
        if (length == 1) {
            return d;
        } else if (length % 2 == 0) {
            int tmp = getLength(d, length / 2);
            return (tmp * pow(3, length / 2) + tmp) % 7;
        } else {
            return (getLength(d, length - 1) * 10 + d) % 7;
        }
    }
    
    static int pow(int x, int p) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return pow(x * x % 7, p / 2);
        } else {
            return pow(x, p - 1) * x % 7;
        }
    }
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}