import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.imageio.*;
import java.math.*;
class main {

static CharComparator ciCharComparator_cache;
static CharComparator ciCharComparator() { if (ciCharComparator_cache == null) ciCharComparator_cache = ciCharComparator_load(); return ciCharComparator_cache; }

static CharComparator ciCharComparator_load() {
  return new ciCharComparator_C();
}

final static class ciCharComparator_C implements CharComparator {
  public int compare(char c1, char c2) {
    if (c1 == c2) return 0;
    c1 = Character.toUpperCase(c1);
    c2 = Character.toUpperCase(c2);
    if (c1 == c2) return 0;
    c1 = Character.toLowerCase(c1);
    c2 = Character.toLowerCase(c2);
    // No overflow because of numeric promotion
    return c1 - c2;
  }
}
static interface CharComparator {
  int compare(char a, char b);
}
}