#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
using namespace std;
typedef long long ll;
const int mod=1e9+7;
int arr[2][6]={{1,3,2,6,4,5},{0,1,4,6,5,2}},dp[100001][6][7];
int main(){
	static int K,d[100000],l[100000];
	cin>>K;
	for(int i=K-1;i>=0;i--)
		cin>>d[i]>>l[i];
	dp[0][0][0]=1;
	for(int i=0;i<K;i++){
		for(int j=0;j<6;j++){
			for(int k=0;k<7;k++){
				(dp[i+1][(j+l[i])%6][(k+d[i]*arr[0][j%6]*arr[1][l[i]%6])%7]+=dp[i][j][k])%=mod;
				(dp[i+1][j][k]+=dp[i][j][k])%=mod;
			}
		}
	}
	int ans=0;
	for(int i=0;i<6;i++)
		for(int j=0;j<7;j++)
			(ans+=(ll)dp[K][i][j]*j%mod)%=mod;
	cout<<ans<<endl;
}