#include <iostream>
#include <string>

using namespace std;

bool dec_str(string &N) {
	// Format check should be done.
	bool const positive = (N != "0");

	// Decrement
	if (positive) {
		size_t const last_pos = N.size() - 1;
		if (N[last_pos] == '0') {
			size_t i = last_pos;
			while (N[i] == '0') {
				N[i--] = '9';
			}
			N[i]--;
		}
		else {
			N[last_pos]--;
		}

		while (N.size() > 1 and N[0] == '0') {
			N = N.substr(1);
		}
	}

	return positive;
}

#define DIVISOR 1000000007;
int main(void) {
	string N_3;
	cin >> N_3;
	long long num = 1;
	while (dec_str(N_3)) {
		num = (10 * num + 3) % DIVISOR;
	}
	cout << num << endl;
	return 0;
}