#include <iostream>
#include <math.h>
using namespace std;
typedef unsigned long long UL;
int main(int argc, char* argv[])
{
	UL N;
	cin>>N;
	const UL MOD=1000000007;
	const UL P5=pow(5.0,20);
	if (N==1){
		cout<<2<<endl;
		return 0;
	}
	UL n=N/2;
	UL i;
	UL aw;
	aw=4;
	while (n>=20){
		aw*=P5;
		aw%=MOD;
		n-=20;
	}
	for (i=1;i<n;i++){
		aw*=5;
		aw%=MOD;
	}
	if (N%2==1){
		aw*=3;
		aw%=MOD;
	}
	cout<<aw<<endl;
	return 0;
}