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#include <bits/stdc++.h>
using namespace std;
vector<char> a,b,c,t;

void dod(vector<char> *a,vector<char> *b){

    vector<char>::iterator it,it2;
    it2=a->begin();

    int d=0;
    for(it=b->begin();it!=b->end();++it){
        int y=*it+*it2-96+d;
        d=y/10;
        char z=y%10+48;

        *it=*it2; // b=a
        *it2=z;   // a=c

        ++it2;
    }

    for(it2;it2!=a->end();++it2){
        int y=*it2-48+d;
        d=y/10;
        char z=y%10+48;

        b->push_back(*it2); //b=a
        *it2=z;   // a=c
    }
    if(d==1)a->push_back('1');
}

bool comp(vector<char> *a){
//return false;
     vector<char>::iterator it,it2;

     it2=a->begin();
     for(it=c.begin();it!=c.end();++it){
        if(*(it)!=*(it2)){return false;}
        ++it2;
    }
    return true;
}

void vout(vector<char> *v){
     vector<char>::iterator it;
    for(it=v->end();it!=v->begin();--it){
        cout<<*(it-1);
    }
    cout<<endl;
}



int main(){
    ios::sync_with_stdio(0);
    string w;
    cin>>w;
    for(int i=w.size()-1;i>=0;i--)c.push_back(w[i]);

    a.push_back('1');
    b.push_back('1');

    while(a.size()<101){
        if(comp(&a)){vout(&a);return 0;}
        dod(&a,&b);
    }
    cout<<"NIE"<<endl;
    return 0;
}