///expresie6
#include <iostream>
#include <cstring>
using namespace std;

bool Cifra(char X)
{
    return X >='0' && X<='9';
}

int main()
{
    char s[256];
    cin.getline(s , 256);
    int coefX = 0 , coefY = 0, coefZ = 0;
    bool apareX = false, apareY = false , apareZ = false;
    int semn = 1 , coef = 0;
    bool amCoef = false;
    int n = strlen(s);
    for(int i = 0 ; i < n ; i ++)
    {
        if(s[i] == '+')
            semn = 1;
        if(s[i] == '-')
            semn = -1;
        if(Cifra(s[i]))
        {
            coef = 0, amCoef = true;
            while(Cifra(s[i]))
                coef = 10 * coef + s[i] - '0' , i ++;
        }
        if(s[i] == 'x' || s[i] == 'y' || s[i] == 'z')
        {
            if(!amCoef)
                coef = 1;
            if(s[i] == 'x')
                apareX = true, coefX += semn * coef;
            if(s[i] == 'y')
                apareY = true, coefY += semn * coef;
            if(s[i] == 'z')
                apareZ = true, coefZ += semn * coef;
            semn = 1, coef = 0, amCoef = false;
        }
    }
    int cf[4]={-2000000001 , coefX, coefY, coefZ}, apare[4]={0 , apareX,apareY,apareZ};
    int pozMax = 0;
    for(int i = 1; i <= 3 ; i ++)
        if(apare[i])
            if(cf[i] > cf[pozMax])
                pozMax = i;
    if(pozMax == 1)
        cout << cf[pozMax] << "x";
    if(pozMax == 2)
        cout << cf[pozMax] << "y";
    if(pozMax == 3)
        cout << cf[pozMax] << "z";
    return 0;
}
/////parole
#include <fstream>
#include <iostream>
#include <cstring>
using namespace std;

ifstream fin("parole.in");
ofstream fout("parole.out");

bool cifra(char X)
{
    return X >= '0' && X <= '9';
}

bool litera_mica(char X)
{
    return X >= 'a' && X <= 'z';
}

bool litera_mare(char X)
{
    return X >= 'A' && X <= 'Z';
}

bool caracter(char X)
{
    return strchr(".,?!;:_!#@" , X) != NULL;
}

int main()
{
    int n , cnt = 0;
    char s[51];
    fin >> n;
    fin.getline(s , 51);
    for(int i = 1 ; i <= n ; i ++)
    {
        fin.getline(s , 51);
        bool lungime = strlen(s) >=8 , litmari = false, litmici = false, cifre = false, caractere = false;
        for(int i = 0 ; s[i] ; i ++)
        {
            if ( litera_mare(s[i]) )
                litmari = true;
            if ( litera_mica(s[i]) )
                litmici = true;
            if ( cifra(s[i]) )
                cifre = true;
            if ( caracter(s[i]) )
                caractere = true;
        }
        if(lungime && litmari && litmici && cifre && caractere)
            cnt ++;
    }
    fout << cnt;
    return 0;

}
///////multimi4
#include <iostream>
#include <cstring>
using namespace std;

int v[26];

int main()
{
    char s[256];
    int mari = 0, mici = 0;
    cin.getline(s , 256);
    for(int i = 0 ; s[i] ; i ++)
        if(s[i] >='a' && s[i] <='z')
            mici ++ , v[s[i] - 'a'] = 1;
        else
            if(s[i] >='A' && s[i] <='Z')
                mari ++ , v[s[i] - 'A'] = 1;
    int pp = 0;
    cout << "{";
    for(int i = 0 ; i < 26 ; i ++)
        if(v[i])
        {
            if(pp)
                cout << ",";
            if(mari >= mici)
                cout << (char)('A'+i);
            else
                cout << (char)('a'+i);
            pp = 1;
        }
    cout << "}";
    return 0;
}
////////cuvinte
#include <iostream>
#include <cstring>
using namespace std;

char s[2560];
char v[100][16] , * t;
int f[100] , x[100] , n;


int main()
{
    cin.getline(s , 2560);
    t = strtok(s , " ");
    while(t)
    {
        int poz = -1;
        for(int i = 0 ; i < n && poz == -1 ; i ++)
            if(strcmp(t , v[i]) == 0)
                poz = i;
        if(poz == -1)
        {
            strcpy(v[n] , t);
            f[n] = 1;
            x[n] = n;
            n ++;
        }
        else
            f[poz] ++;
        t = strtok(NULL , " ");
    }
    for(int i = 0 ; i < n ; i ++)
        for(int j = i + 1 ; j < n ; j ++)
            if(strcmp(v[x[i]] , v[x[j]]) > 0)
            {
                int aux = x[i] ;
                x[i]  =x[j];
                x[j] = aux;
            }
    for(int i = 0 ; i < n ; i ++)
        cout << v[x[i]] << " " << f[x[i]] << "\n";

    return 0;
}
////////cezar
#include <iostream>
#include <cstring>
using namespace std;

char s[256];
int n;

char dep[100];

int main()
{
    cin.getline(s , 256);
    cin >> n;

    for(int i = 0 ; i < 26;i++)
        dep[i] = dep[i+26] = i+'a';

    for(int i = 0; s[i] ; i ++)
        if(s[i] >= 'a' && s[i] <='z')
            s[i] = dep[s[i] - 'a' + n];

    cout << s;
    return 0;
}
//////truncaleft
#include <iostream>

using namespace std;

bool is_prime(int x){
    if(x < 2)
        return 0;
    if(x != 2 && x % 2 == 0)
        return 0;
    for(int d = 3; d * d <= x; d += 2)
        if(x % d == 0)
            return 0;
    return 1;
}

int nr_digits(int x)
{
    int cnt = 0;
    do{
        x /= 10;
        cnt++;
    }
    while(x);
    return cnt;
}

int pow10(int x)
{
    int r = 1;
    for(;x;--x)
        r *= 10;
    return r;
}

void removeFirstDigit(int &n)
{
    if(n < 9)
    {
        n = 0;
        return;
    }
    int nrdig = nr_digits(n);
    n = n % pow10(nrdig - 1);
}
int main()
{
    int n; cin >> n;
    bool pp = true;

    while(n)
    {
        if(!is_prime(n))
            pp = false;
        removeFirstDigit(n);
    }

    cout << (pp ? "DA" : "NU");
    return 0;
}
////////