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 int levenWithSwapsIC(String s, String t) {
  // degenerate cases
  if (s.equals(t)) return 0;
  int ls = s.length(), lt = t.length();
  if (ls == 0) return lt;
  if (lt == 0) return ls;

  int[] vx = new int[lt + 1];
  int[] v0 = new int[lt + 1];
  int[] v1 = new int[lt + 1];

  for (int i = 0; i < v0.length; i++) v0[i] = i;

  for (int i = 0; i < ls; i++) {
      v1[0] = i + 1;

      for (int j = 0; j < lt; j++) {
          int cost = equalsIgnoreCase(s.charAt(i), t.charAt(j)) ? 0 : 1;
          int d = min3(
            v1[j] + 1,     // delete
            v0[j + 1] + 1, // insert
            v0[j] + cost); // edit
            
          if (i > 0 && j > 0 && equalsIgnoreCase(s.charAt(i), t.charAt(j-1)) && equalsIgnoreCase(s.charAt(i-1), t.charAt(j)))
            d = min(d, vx[j-1] + 1); // transposition
          v1[j + 1] = d;
      }

      // rotate arrays
      int[] v = vx;
      vx = v0;
      v0 = v1;
      v1 = v;
  }

  return v0[lt];
}
static boolean equalsIgnoreCase(String a, String b) {
  return eqic(a, b);
}

static boolean equalsIgnoreCase(char a, char b) {
  return eqic(a, b);
}
static int min3(int a, int b, int c) {
  return min(min(a, b), c);
}
static int min(int a, int b) {
  return Math.min(a, b);
}

static long min(long a, long b) {
  return Math.min(a, b);
}

static float min(float a, float b) { return Math.min(a, b); }
static float min(float a, float b, float c) { return min(min(a, b), c); }

static double min(double a, double b) {
  return Math.min(a, b);
}

static double min(double[] c) {
  double x = Double.MAX_VALUE;
  for (double d : c) x = Math.min(x, d);
  return x;
}

static float min(float[] c) {
  float x = Float.MAX_VALUE;
  for (float d : c) x = Math.min(x, d);
  return x;
}

static byte min(byte[] c) {
  byte x = 127;
  for (byte d : c) if (d < x) x = d;
  return x;
}

static short min(short[] c) {
  short x = 0x7FFF;
  for (short d : c) if (d < x) x = d;
  return x;
}

static int min(int[] c) {
  int x = Integer.MAX_VALUE;
  for (int d : c) if (d < x) x = d;
  return x;
}


static boolean eqic(String a, String b) {
  
  
    if ((a == null) != (b == null)) return false;
    if (a == null) return true;
    return a.equalsIgnoreCase(b);
  
}



static boolean eqic(char a, char b) {
  if (a == b) return true;
  
    char u1 = Character.toUpperCase(a);
    char u2 = Character.toUpperCase(b);
    if (u1 == u2) return true;
  
  return Character.toLowerCase(u1) == Character.toLowerCase(u2);
}


static boolean eq(Object a, Object b) {
  return a == b || (a == null ? b == null : b != null && a.equals(b));
}


static String asString(Object o) {
  return o == null ? null : o.toString();
}


static String str(Object o) {
  return o == null ? "null" : o.toString();
}

static String str(char[] c) {
  return new String(c);
}

}