import java.io.*;
import java.util.*;
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];
        for (int i = 0; i < n; i++) {
            int d = sc.nextInt();
            int length = sc.nextInt();
            int p = pow7(3, length);
            int v = order7(d % 7, length);
            int[] next = new int[7];
            for (int j = 0; j < 7; j++) {
                next[(j * p + v) % 7] += counts[j];
                next[(j * p + v) % 7] %= MOD;
            }
            next[v]++;
            for (int j = 0; j < 7; j++) {
                counts[j] += next[j];
                counts[j] %= MOD;
            }
        }
        long ans = 0;
        for (int i = 1; i < 7; i++) {
            ans += counts[i] * (long)i % MOD;
            ans %= MOD;
        }
        System.out.println(ans);
    }
    
    static int order7(int x, int length) {
        if (length == 1) {
            return x;
        } else if (length % 2 == 0) {
            int v = order7(x, length / 2);
            return (v * pow7(3, length / 2) + v) % 7;
        } else {
            return (order7(x, length - 1) * 10 + x) % 7;
        }
    }
    
    static int pow7(int x, int p) {
        if (p == 0) {
            return 1;
        } else if (p % 2 == 0) {
            return pow7(x * x % 7, p / 2);
        } else {
            return pow7(x, p - 1) * x % 7;
        }
    }
    
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}