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#include <iostream>
#define LLL unsigned long long
using namespace std;

string a;
int tabpom[]={0,6,11,16,20,25,30,35,39,44,49,54,59,63,68,73,78,83,87,92,97,102};
LLL mod=1ULL,rest=0,ppprev=0,curr=1,x;
int main() {
	ios_base::sync_with_stdio(0);
	cin>>a;
	for(int i=0;i<a.length();i++){
		mod*=10;
		rest=rest*10+a[i]-'0';
	}
	//	atoi(a);
	int tmp=rest%8;
	if(a.length()>2){
	if((tmp==4)||(tmp==6)){
		cout<<"NIE";
		return 0;
	}
	}
	for(LLL i=2;(i<15*mod);i++){
		if(curr==rest){
			if(i>tabpom[a.length()-1]){
				//znalezione
				cout<<i-1;
				return 0;
			}
		}
		tmp=curr;
		curr=(ppprev+curr)%mod;
		ppprev=tmp;
		
	}
	return 0;
}