import java.io.*;
import java.util.*;

public class Main {
    class $R {
        InputStream in; byte b; byte[] buf; int bi, bz;
        $R(InputStream I) { in=I; buf=new byte[65536]; bi=bz=0; read(); }
        void skip() { while (b >= 0 && b <= 32) read(); }
        void read() {
            if (bi==bz) {
                bi=0; try { bz=in.read(buf); } catch(Exception e) { bz=-1; } }
            b = bz == -1 ? -1 : buf[bi++];  }

        int nextInt() {
            int i=0; boolean s=false; skip();
            if (b == '-') { s=true; read(); }
            for (; b > 32; read()) i = i*10 + b-48; return s ? -i : i; }
    }
    class $W extends PrintWriter {
        $W() { super(new BufferedOutputStream(System.out)); }
    }

    void run() {
        $R $r = new $R(System.in);
        $W $w = new $W();

        int n = 0;
        while ( ( n = $r.nextInt() ) != 0 ) {
            int result = 42;  // insert your logic here

            $w.println("f91(" + n + ") = " + result );
        }

        $w.close();
    }
    public static void main ( String[] args ) {
        new Main().run();
    }
}