// import java.*;

public class brute {

char[] canUse = {
´0´, ´1´, ´2´, ´3´, ´4´, ´5´, ´6´, ´7´, ´8´, ´9´,
´a´, ´b´, ´c´, ´d´, ´e´, ´f´, ´g´, ´h´, ´i´, ´j´, ´k´, ´l´, ´m´, ´n´, ´o´, ´p´, ´q´, ´r´, ´s´, ´t´, ´u´, ´v´, ´w´, ´x´, ´y´, ´z´
};

int maxlen = 3;

public static void main (String[] args) {

brute b = new brute ();
}


public brute () {
int k = 0;

while (k < canUse.length) {
nextString (new Character (canUse[k]).toString ());
k ;
}

}


private void nextString (String s) {

int i = 0;

System.out.println (s);

while (i< canUse.length) {
System.out.println (s new Character (canUse[i]).toString ());

if (new String (s new Character (canUse[i]).toString ()).length () <= maxlen) {nextString (s new Character (canUse[i]).toString ());}
i ;
}

}
}