import java.util.*;enum H{H;System z;String a;{for(Scanner r=new Scanner(z.in);(a="")==a;z.out.println(a))for(long h=r.nextInt()+2&-1L>>>32;h>3;h/=31)a=(char)(h%31+60)+a;}}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).